Vaillant faults · by model
Understand the warning from your boiler
Choose your model and look for the complete code: what it means, how to interpret it, and what data you can observe without opening the boiler. With downloadable manuals for further consultation.
A code guides the diagnosis: it does not confirm by itself a faulty partF.28 and F.028 do not interchange between generations. The following tables show only the identified models and documents.
Find your Vaillant model
Check the complete designation in the documentation or accessible identification, without opening the casing. Each guide retains the details, diagrams, and limits of its own generation.
- ecoTEC exclusive CF/1-7VMW 30/36/43 CF/1-7
- ecoTEC plus CS/1-5VMW 23/26/32/36 CS/1-5
- ecoTEC proVMW 236/5-3 and 286/5-3 H-ES
- ecoTEC pureVMW 236/7-2 and 286/7-2 H-ES
- turboTEC plusVM/VMW variants of manual 0020029213_01
Do you have atmoTEC plus or ecoTEC plus /5-5?
They are different generations. Their specific articles are preserved and their tables have not been incorporated into this search engine, because we do not have a verified exact manual for those variants.
Vaillant fault codes by model
Look for the complete code or a word from the warning. If it does not appear, check the variant and its manual: the absence in this selection does not mean that the equipment cannot display it.
264 documented entries in five series. Each code indicates its scope.
ecoTEC exclusive CF/1-7
VMW 30/36/43 CF/1-7 · Manual 0020282293_06.
The table in the manual may include variants and accessories that your unit does not come with. Please confirm its full designation.
84 documented entries
CodeF.000
The signal from the supply temperature sensor has been interrupted.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. The warning identifies a signal or measurement that needs to be checked; it does not, by itself, indicate that the sensor needs to be replaced.
What can you observe? Keep a photo of the code and any indicated temperature or pressure. Do not disconnect sensors or bridge connections.
CodeF.001
The signal from the return temperature sensor has been interrupted.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. The warning identifies a signal or measurement that needs to be checked; it does not, by itself, indicate that the sensor needs to be replaced.
What can you observe? Keep a photo of the code and any indicated temperature or pressure. Do not disconnect sensors or bridge connections.
CodeF.002
The signal from the domestic hot water temperature sensor has been interrupted.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. The warning identifies a signal or measurement that needs to be checked; it does not, by itself, indicate that the sensor needs to be replaced.
What can you observe? Keep a photo of the code and any indicated temperature or pressure. Do not disconnect sensors or bridge connections.
CodeF.003
The signal from the temperature sensor of the accumulator has been interrupted.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. The warning identifies a signal or measurement that needs to be checked; it does not, by itself, indicate that the sensor needs to be replaced.
What can you observe? Keep a photo of the code and any indicated temperature or pressure. Do not disconnect sensors or bridge connections.
CodeF.010
A short circuit has occurred in the supply temperature sensor.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. The warning identifies a signal or measurement that needs to be checked; it does not, by itself, indicate that the sensor needs to be replaced.
What can you observe? Keep a photo of the code and any indicated temperature or pressure. Do not disconnect sensors or bridge connections.
CodeF.011
A short circuit has occurred in the return temperature sensor.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. The warning identifies a signal or measurement that needs to be checked; it does not, by itself, indicate that the sensor needs to be replaced.
What can you observe? Keep a photo of the code and any indicated temperature or pressure. Do not disconnect sensors or bridge connections.
CodeF.012
The temperature sensor of the hot water connection is short-circuited.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. The warning identifies a signal or measurement that needs to be checked; it does not, by itself, indicate that the sensor needs to be replaced.
What can you observe? Keep a photo of the code and any indicated temperature or pressure. Do not disconnect sensors or bridge connections.
CodeF.013
A short circuit has occurred in the temperature sensor of the accumulator.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. The warning identifies a signal or measurement that needs to be checked; it does not, by itself, indicate that the sensor needs to be replaced.
What can you observe? Keep a photo of the code and any indicated temperature or pressure. Do not disconnect sensors or bridge connections.
CodeF.020
The safety temperature limiter (STB) interrupts the control of the gas valve. The gas valve has closed because the temperature of the supply or return temperature sensor has exceeded the maximum limit.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. The warning identifies a signal or measurement that needs to be checked; it does not, by itself, indicate that the sensor needs to be replaced.
What can you observe? Keep a photo of the code and any indicated temperature or pressure. Do not disconnect sensors or bridge connections.
CodeF.022
There is no water in the product, it is insufficient, or the water pressure is too low.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. The warning refers to the water in the circuit; it does not independently identify a leak or a faulty pump.
What can you observe? Note the visible pressure and whether it has changed since the last use. Indicate if you see water under the equipment, without opening it or filling it by trial.
CodeF.023
The temperature difference between the supply and return is excessive.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. The boiler detects an excessive difference between supply and return. It is not the same warning as a rapid temperature rise.
What can you observe? Indicate whether it occurs when requesting heating or hot water and if the radiators were heating. Do not manipulate the pump or the sensors.
CodeF.024
The temperature increase is too rapid.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. The relevant factor is the speed at which the temperature increases, not just its final value.
What can you observe? Note how long it takes to appear from the demand and what temperature the display shows, if accessible.
CodeF.025
The temperature of the combustion gases is too high.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. It is a warning from the combustion control or flame detection system. It requires checking its cause before choosing a spare part.
What can you observe? Indicate whether it appears when starting or after heating. Do not intervene in gas, electrodes, or combustion adjustments.
CodeF.027
A flame signal was detected and the burner is off.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. It is a warning from the combustion control or flame detection system. It requires checking its cause before choosing a spare part.
What can you observe? Indicate whether it appears when starting or after heating. Do not intervene in gas, electrodes, or combustion adjustments.
CodeF.028
During the ignition phase, the flame signal was not detected.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. The ignition does not establish the flame when starting. It is different from a fault occurring during an already established flame.
What can you observe? Indicate whether it occurs when opening a hot tap, when requesting heating, or in both cases. Do not force the start with repeated resets.
CodeF.029
The ignition failed due to lack of flame during operation.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. The flame goes out during operation. The moment of the cut helps to differentiate it from an initial ignition fault.
What can you observe? Note whether the equipment had heated before stopping and if it happens consistently or intermittently. Do not check gas components.
CodeF.032
The fan speed is out of tolerance.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. This meaning corresponds to the indicated variant and its manual. The code guides the diagnosis, but does not confirm a spare part.
What can you observe? Please provide a photo of the warning, the equipment reference, and when it appears: during startup, in heating mode, or with hot water.
CodeF.035
The air intake/exhaust duct is blocked.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. It is a warning from the combustion control or flame detection system. It requires checking its cause before choosing a spare part.
What can you observe? Indicate whether it appears when starting or after heating. Do not intervene in gas, electrodes, or combustion adjustments.
CodeF.040
The air excess factor is too low.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. This meaning corresponds to the indicated variant and its manual. The code guides the diagnosis, but does not confirm a spare part.
What can you observe? Please provide a photo of the warning, the equipment reference, and when it appears: during startup, in heating mode, or with hot water.
CodeF.042
The coding resistor (in the wiring harness) or the gas group resistor (on the PCB if it exists) is not valid.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. It is a warning from the combustion control or flame detection system. It requires checking its cause before choosing a spare part.
What can you observe? Indicate whether it appears when starting or after heating. Do not intervene in gas, electrodes, or combustion adjustments.
CodeF.044
The ionization signal of the regulation electrode is too low. The drift adaptation has failed.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. It is a warning from the combustion control or flame detection system. It requires checking its cause before choosing a spare part.
What can you observe? Indicate whether it appears when starting or after heating. Do not intervene in gas, electrodes, or combustion adjustments.
CodeF.047
The signal from the domestic hot water temperature sensor at the outlet of the internal accumulator is not plausible.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. The warning identifies a signal or measurement that needs to be checked; it does not, by itself, indicate that the sensor needs to be replaced.
What can you observe? Keep a photo of the code and any indicated temperature or pressure. Do not disconnect sensors or bridge connections.
CodeF.049
The eBUS is short-circuited or two active eBUS sources have reversed polarity.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. The warning relates to the control, its communications, or its configuration. It is not sufficient to confirm a faulty PCB.
What can you observe? Indicate if it appeared after a power cut, an intervention, or a change of control. Do not modify installer parameters.
CodeF.057
The combustion regulation has failed and so has the corresponding emergency mode.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. It is a warning from the combustion control or flame detection system. It requires checking its cause before choosing a spare part.
What can you observe? Indicate whether it appears when starting or after heating. Do not intervene in gas, electrodes, or combustion adjustments.
CodeF.061
ASIC or µController does not operate within the defined time limits.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. This meaning corresponds to the indicated variant and its manual. The code guides the diagnosis, but does not confirm a spare part.
What can you observe? Please provide a photo of the warning, the equipment reference, and when it appears: during startup, in heating mode, or with hot water.
CodeF.062
The flame disconnection is detected with a delay.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. It is a warning from the combustion control or flame detection system. It requires checking its cause before choosing a spare part.
What can you observe? Indicate whether it appears when starting or after heating. Do not intervene in gas, electrodes, or combustion adjustments.
CodeF.063
EEPROM warns of an error during the read and write test.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. The warning relates to the control, its communications, or its configuration. It is not sufficient to confirm a faulty PCB.
What can you observe? Indicate if it appeared after a power cut, an intervention, or a change of control. Do not modify installer parameters.
CodeF.064
The sensor signal could not be converted correctly.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. The warning identifies a signal or measurement that needs to be checked; it does not, by itself, indicate that the sensor needs to be replaced.
What can you observe? Keep a photo of the code and any indicated temperature or pressure. Do not disconnect sensors or bridge connections.
CodeF.065
The operating temperature range of an electronic component has been exceeded.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. The control has detected a temperature condition. The code and the moment it appears must be evaluated together.
What can you observe? Note the displayed temperature and whether the heating or hot water was functioning. Do not disable protections.
CodeF.067
The flame controller is faulty.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. It is a warning from the combustion control or flame detection system. It requires checking its cause before choosing a spare part.
What can you observe? Indicate whether it appears when starting or after heating. Do not intervene in gas, electrodes, or combustion adjustments.
CodeF.068
The flame controller reports an unstable signal.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. It is a warning from the combustion control or flame detection system. It requires checking its cause before choosing a spare part.
What can you observe? Indicate whether it appears when starting or after heating. Do not intervene in gas, electrodes, or combustion adjustments.
CodeF.070
The device identification (DSN) is incorrect, missing, or does not match the coding resistance.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. The warning relates to the control, its communications, or its configuration. It is not sufficient to confirm a faulty PCB.
What can you observe? Indicate if it appeared after a power cut, an intervention, or a change of control. Do not modify installer parameters.
CodeF.071
The supply temperature sensor records implausible values.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. The warning identifies a signal or measurement that needs to be checked; it does not, by itself, indicate that the sensor needs to be replaced.
What can you observe? Keep a photo of the code and any indicated temperature or pressure. Do not disconnect sensors or bridge connections.
CodeF.072
The temperature difference between the supply and return temperature sensors is not valid.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. The warning identifies a signal or measurement that needs to be checked; it does not, by itself, indicate that the sensor needs to be replaced.
What can you observe? Keep a photo of the code and any indicated temperature or pressure. Do not disconnect sensors or bridge connections.
CodeF.074
The signal from the water pressure sensor is interrupted.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. The warning identifies a signal or measurement that needs to be checked; it does not, by itself, indicate that the sensor needs to be replaced.
What can you observe? Keep a photo of the code and any indicated temperature or pressure. Do not disconnect sensors or bridge connections.
CodeF.075
The pressure jump at the start of the heating pump is too low.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. The control does not detect the expected pressure change when starting the pump; the code does not confirm which component is causing it.
What can you observe? Note the indicated pressure before the warning and if it appears when starting the demand. The check of the pump, sensor, and circuit is the technician's responsibility.
CodeF.076
The overheating protection of the primary heat exchanger is active.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. The control has detected a temperature condition. The code and the moment it appears must be evaluated together.
What can you observe? Note the displayed temperature and whether the heating or hot water was functioning. Do not disable protections.
CodeF.077
A condensate pump or a flue gas non-return valve block the operation of the burner.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. It is a warning from the combustion control or flame detection system. It requires checking its cause before choosing a spare part.
What can you observe? Indicate whether it appears when starting or after heating. Do not intervene in gas, electrodes, or combustion adjustments.
CodeF.078
The control module is not supported by the device.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. This meaning corresponds to the indicated variant and its manual. The code guides the diagnosis, but does not confirm a spare part.
What can you observe? Please provide a photo of the warning, the equipment reference, and when it appears: during startup, in heating mode, or with hot water.
CodeF.080
The cold water inlet temperature sensor in the internal storage tank is faulty.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. The warning identifies a signal or measurement that needs to be checked; it does not, by itself, indicate that the sensor needs to be replaced.
What can you observe? Keep a photo of the code and any indicated temperature or pressure. Do not disconnect sensors or bridge connections.
CodeF.081
The boost has failed.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. This meaning corresponds to the indicated variant and its manual. The code guides the diagnosis, but does not confirm a spare part.
What can you observe? Please provide a photo of the warning, the equipment reference, and when it appears: during startup, in heating mode, or with hot water.
CodeF.083
When starting the burner, no increase in temperature is recorded, or an increase is recorded too slowly on the supply or return temperature sensor.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. The warning identifies a signal or measurement that needs to be checked; it does not, by itself, indicate that the sensor needs to be replaced.
What can you observe? Keep a photo of the code and any indicated temperature or pressure. Do not disconnect sensors or bridge connections.
CodeF.084
The temperature difference between the supply and return temperature sensor results in implausible values.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. The warning identifies a signal or measurement that needs to be checked; it does not, by itself, indicate that the sensor needs to be replaced.
What can you observe? Keep a photo of the code and any indicated temperature or pressure. Do not disconnect sensors or bridge connections.
CodeF.085
The NTC sensors are incorrectly mounted.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. The warning identifies a signal or measurement that needs to be checked; it does not, by itself, indicate that the sensor needs to be replaced.
What can you observe? Keep a photo of the code and any indicated temperature or pressure. Do not disconnect sensors or bridge connections.
CodeF.087
The ignition transformer is not connected to the PCB.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. It is a warning from the combustion control or flame detection system. It requires checking its cause before choosing a spare part.
What can you observe? Indicate whether it appears when starting or after heating. Do not intervene in gas, electrodes, or combustion adjustments.
CodeF.088
The electrical connection with the gas valve has been interrupted.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. It is a warning from the combustion control or flame detection system. It requires checking its cause before choosing a spare part.
What can you observe? Indicate whether it appears when starting or after heating. Do not intervene in gas, electrodes, or combustion adjustments.
CodeF.089
The integrated heating pump is not suitable for the appliance model.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. The warning must be interpreted along with the circuit status and the equipment readings; it does not indicate a specific part by itself.
What can you observe? Note the visible pressure and the affected service. The internal circuit check is the responsibility of the professional.
CodeF.090
The communication with the internal accumulator is interrupted.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. The warning relates to the control, its communications, or its configuration. It is not sufficient to confirm a faulty PCB.
What can you observe? Indicate if it appeared after a power cut, an intervention, or a change of control. Do not modify installer parameters.
CodeF.092
The gas type change has not been completed correctly.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. It is a warning from the combustion control or flame detection system. It requires checking its cause before choosing a spare part.
What can you observe? Indicate whether it appears when starting or after heating. Do not intervene in gas, electrodes, or combustion adjustments.
CodeF.095
The stepper motor of the gas valve has reached the minimum allowed number of steps.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. It is a warning from the combustion control or flame detection system. It requires checking its cause before choosing a spare part.
What can you observe? Indicate whether it appears when starting or after heating. Do not intervene in gas, electrodes, or combustion adjustments.
CodeF.096
The stepper motor of the gas valve has reached the maximum allowed number of steps.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. It is a warning from the combustion control or flame detection system. It requires checking its cause before choosing a spare part.
What can you observe? Indicate whether it appears when starting or after heating. Do not intervene in gas, electrodes, or combustion adjustments.
CodeF.097
The self-check of the main PCB has failed.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. The warning relates to the control, its communications, or its configuration. It is not sufficient to confirm a faulty PCB.
What can you observe? Indicate if it appeared after a power cut, an intervention, or a change of control. Do not modify installer parameters.
CodeF.105
When replacing a gas valve or a printed circuit board and the display simultaneously, it will be necessary to adjust the gas valve deviation to match that of the current gas valve.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. It is a warning from the combustion control or flame detection system. It requires checking its cause before choosing a spare part.
What can you observe? Indicate whether it appears when starting or after heating. Do not intervene in gas, electrodes, or combustion adjustments.
CodeF.110
A correct ignition could not be detected with the enriched air and gas mixture.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. It is a warning from the combustion control or flame detection system. It requires checking its cause before choosing a spare part.
What can you observe? Indicate whether it appears when starting or after heating. Do not intervene in gas, electrodes, or combustion adjustments.
CodeF.194
The power supply of the PCB is faulty.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. The warning relates to the control, its communications, or its configuration. It is not sufficient to confirm a faulty PCB.
What can you observe? Indicate if it appeared after a power cut, an intervention, or a change of control. Do not modify installer parameters.
CodeF.195
The device has detected a significant undervoltage in the power supply.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. The warning relates to the control, its communications, or its configuration. It is not sufficient to confirm a faulty PCB.
What can you observe? Indicate if it appeared after a power cut, an intervention, or a change of control. Do not modify installer parameters.
CodeF.196
The device has detected a significant overvoltage in the power supply.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. The warning relates to the control, its communications, or its configuration. It is not sufficient to confirm a faulty PCB.
What can you observe? Indicate if it appeared after a power cut, an intervention, or a change of control. Do not modify installer parameters.
CodeF.228
The device was in emergency mode. In that state, it could not be turned on during the ignition phase.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. It is a warning from the combustion control or flame detection system. It requires checking its cause before choosing a spare part.
What can you observe? Indicate whether it appears when starting or after heating. Do not intervene in gas, electrodes, or combustion adjustments.
CodeF.229
The device was in emergency mode. In that state, it could not ignite due to a flame failure.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. It is a warning from the combustion control or flame detection system. It requires checking its cause before choosing a spare part.
What can you observe? Indicate whether it appears when starting or after heating. Do not intervene in gas, electrodes, or combustion adjustments.
CodeF.235
The air intake/exhaust duct is blocked during the first startup.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. It is a warning from the combustion control or flame detection system. It requires checking its cause before choosing a spare part.
What can you observe? Indicate whether it appears when starting or after heating. Do not intervene in gas, electrodes, or combustion adjustments.
CodeF.281
The flame has failed during the stabilization period.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. It is a warning from the combustion control or flame detection system. It requires checking its cause before choosing a spare part.
What can you observe? Indicate whether it appears when starting or after heating. Do not intervene in gas, electrodes, or combustion adjustments.
CodeF.291
The flame has failed during the stabilization time due to a flame loss during operation.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. It is a warning from the combustion control or flame detection system. It requires checking its cause before choosing a spare part.
What can you observe? Indicate whether it appears when starting or after heating. Do not intervene in gas, electrodes, or combustion adjustments.
CodeF.317
The flow sensor signal in the domestic hot water circuit is not plausible.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. The warning identifies a signal or measurement that needs to be checked; it does not, by itself, indicate that the sensor needs to be replaced.
What can you observe? Keep a photo of the code and any indicated temperature or pressure. Do not disconnect sensors or bridge connections.
CodeF.318
The 3-way motorised valve is not moving.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. This meaning corresponds to the indicated variant and its manual. The code guides the diagnosis, but does not confirm a spare part.
What can you observe? Please provide a photo of the warning, the equipment reference, and when it appears: during startup, in heating mode, or with hot water.
CodeF.320
The heating pump is blocked. The unlocking function has not been performed correctly.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. The warning must be interpreted along with the circuit status and the equipment readings; it does not indicate a specific part by itself.
What can you observe? Note the visible pressure and the affected service. The internal circuit check is the responsibility of the professional.
CodeF.321
The pump electronics are faulty.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. The warning relates to the control, its communications, or its configuration. It is not sufficient to confirm a faulty PCB.
What can you observe? Indicate if it appeared after a power cut, an intervention, or a change of control. Do not modify installer parameters.
CodeF.322
The heating pump is overheating. The emergency operation has not been able to reduce the temperature.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. The control has detected a temperature condition. The code and the moment it appears must be evaluated together.
What can you observe? Note the displayed temperature and whether the heating or hot water was functioning. Do not disable protections.
CodeF.323
The heating pump is running dry.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. The warning must be interpreted along with the circuit status and the equipment readings; it does not indicate a specific part by itself.
What can you observe? Note the visible pressure and the affected service. The internal circuit check is the responsibility of the professional.
CodeF.324
The electrical connection of the pumps has been interrupted.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. The warning must be interpreted along with the circuit status and the equipment readings; it does not indicate a specific part by itself.
What can you observe? Note the visible pressure and the affected service. The internal circuit check is the responsibility of the professional.
CodeF.325
The heating pump has a fault.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. The warning must be interpreted along with the circuit status and the equipment readings; it does not indicate a specific part by itself.
What can you observe? Note the visible pressure and the affected service. The internal circuit check is the responsibility of the professional.
CodeF.326
The hydraulic test of the sensor and the actuator has determined that at least two hydraulic components are not functioning.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. The warning identifies a signal or measurement that needs to be checked; it does not, by itself, indicate that the sensor needs to be replaced.
What can you observe? Keep a photo of the code and any indicated temperature or pressure. Do not disconnect sensors or bridge connections.
CodeF.327
Due to a domestic hot water circuit not connected, the minimum volumetric flow rate of the heating is limited.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. The warning must be interpreted along with the circuit status and the equipment readings; it does not indicate a specific part by itself.
What can you observe? Note the visible pressure and the affected service. The internal circuit check is the responsibility of the professional.
CodeF.330
The pump does not respond to commands during the hydraulic test.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. The warning must be interpreted along with the circuit status and the equipment readings; it does not indicate a specific part by itself.
What can you observe? Note the visible pressure and the affected service. The internal circuit check is the responsibility of the professional.
CodeF.334
The configuration of the combustion gas exhaust installation has not been completed.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. It is a warning from the combustion control or flame detection system. It requires checking its cause before choosing a spare part.
What can you observe? Indicate whether it appears when starting or after heating. Do not intervene in gas, electrodes, or combustion adjustments.
CodeF.336
The device is not allowed in this configuration.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. The warning relates to the control, its communications, or its configuration. It is not sufficient to confirm a faulty PCB.
What can you observe? Indicate if it appeared after a power cut, an intervention, or a change of control. Do not modify installer parameters.
CodeF.337
The multiple gas outlet conversion kit does not fit the heat cell.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. It is a warning from the combustion control or flame detection system. It requires checking its cause before choosing a spare part.
What can you observe? Indicate whether it appears when starting or after heating. Do not intervene in gas, electrodes, or combustion adjustments.
CodeF.338
Incorrect multiple occupancy allocation adjustment
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. This meaning corresponds to the indicated variant and its manual. The code guides the diagnosis, but does not confirm a spare part.
What can you observe? Please provide a photo of the warning, the equipment reference, and when it appears: during startup, in heating mode, or with hot water.
CodeF.342
The air flow sensor is not within the permitted limits.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. The warning identifies a signal or measurement that needs to be checked; it does not, by itself, indicate that the sensor needs to be replaced.
What can you observe? Keep a photo of the code and any indicated temperature or pressure. Do not disconnect sensors or bridge connections.
CodeF.343
The signal from the mass air flow sensor is not plausible.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. The warning identifies a signal or measurement that needs to be checked; it does not, by itself, indicate that the sensor needs to be replaced.
What can you observe? Keep a photo of the code and any indicated temperature or pressure. Do not disconnect sensors or bridge connections.
CodeF.344
The regulation electrode cannot continue to be used.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. This meaning corresponds to the indicated variant and its manual. The code guides the diagnosis, but does not confirm a spare part.
What can you observe? Please provide a photo of the warning, the equipment reference, and when it appears: during startup, in heating mode, or with hot water.
CodeF.347
Condensate has been detected in the combustion chamber. The operation of the burner will be interrupted.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. It is a warning from the combustion control or flame detection system. It requires checking its cause before choosing a spare part.
What can you observe? Indicate whether it appears when starting or after heating. Do not intervene in gas, electrodes, or combustion adjustments.
CodeF.363
The EEPROM on the display warns of an error during the read and write test.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. The warning relates to the control, its communications, or its configuration. It is not sufficient to confirm a faulty PCB.
What can you observe? Indicate if it appeared after a power cut, an intervention, or a change of control. Do not modify installer parameters.
CodeF.707
It is not possible to establish any communication between the display and the PCB.
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. The warning relates to the control, its communications, or its configuration. It is not sufficient to confirm a faulty PCB.
What can you observe? Indicate if it appeared after a power cut, an intervention, or a change of control. Do not modify installer parameters.
CodeF.905
Communication interface disconnected
ecoTEC exclusive CF/1-7 VMW 30/36/43 CF/1-7.
How to interpret it. The warning relates to the control, its communications, or its configuration. It is not sufficient to confirm a faulty PCB.
What can you observe? Indicate if it appeared after a power cut, an intervention, or a change of control. Do not modify installer parameters.
ecoTEC plus CS/1-5
VMW 23/26/32/36 CS/1-5 · Manual 0020282292_07.
The table in the manual may include variants and accessories that your unit does not come with. Please confirm its full designation.
83 documented entries
CodeF.000
The signal from the supply temperature sensor has been interrupted.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. The warning identifies a signal or measurement that needs to be checked; it does not, by itself, indicate that the sensor needs to be replaced.
What can you observe? Keep a photo of the code and any indicated temperature or pressure. Do not disconnect sensors or bridge connections.
CodeF.001
The signal from the return temperature sensor has been interrupted.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. The warning identifies a signal or measurement that needs to be checked; it does not, by itself, indicate that the sensor needs to be replaced.
What can you observe? Keep a photo of the code and any indicated temperature or pressure. Do not disconnect sensors or bridge connections.
CodeF.002
The signal from the domestic hot water temperature sensor has been interrupted.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. The warning identifies a signal or measurement that needs to be checked; it does not, by itself, indicate that the sensor needs to be replaced.
What can you observe? Keep a photo of the code and any indicated temperature or pressure. Do not disconnect sensors or bridge connections.
CodeF.003
The signal from the temperature sensor of the accumulator has been interrupted.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. The warning identifies a signal or measurement that needs to be checked; it does not, by itself, indicate that the sensor needs to be replaced.
What can you observe? Keep a photo of the code and any indicated temperature or pressure. Do not disconnect sensors or bridge connections.
CodeF.010
A short circuit has occurred in the supply temperature sensor.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. The warning identifies a signal or measurement that needs to be checked; it does not, by itself, indicate that the sensor needs to be replaced.
What can you observe? Keep a photo of the code and any indicated temperature or pressure. Do not disconnect sensors or bridge connections.
CodeF.011
A short circuit has occurred in the return temperature sensor.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. The warning identifies a signal or measurement that needs to be checked; it does not, by itself, indicate that the sensor needs to be replaced.
What can you observe? Keep a photo of the code and any indicated temperature or pressure. Do not disconnect sensors or bridge connections.
CodeF.012
The temperature sensor of the hot water connection is short-circuited.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. The warning identifies a signal or measurement that needs to be checked; it does not, by itself, indicate that the sensor needs to be replaced.
What can you observe? Keep a photo of the code and any indicated temperature or pressure. Do not disconnect sensors or bridge connections.
CodeF.013
A short circuit has occurred in the temperature sensor of the accumulator.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. The warning identifies a signal or measurement that needs to be checked; it does not, by itself, indicate that the sensor needs to be replaced.
What can you observe? Keep a photo of the code and any indicated temperature or pressure. Do not disconnect sensors or bridge connections.
CodeF.020
The safety temperature limiter (STB) interrupts the control of the gas valve. The gas valve has closed because the temperature of the supply or return temperature sensor has exceeded the maximum limit.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. The warning identifies a signal or measurement that needs to be checked; it does not, by itself, indicate that the sensor needs to be replaced.
What can you observe? Keep a photo of the code and any indicated temperature or pressure. Do not disconnect sensors or bridge connections.
CodeF.022
There is no water in the product, it is insufficient, or the water pressure is too low.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. The warning refers to the water in the circuit; it does not independently identify a leak or a faulty pump.
What can you observe? Note the visible pressure and whether it has changed since the last use. Indicate if you see water under the equipment, without opening it or filling it by trial.
CodeF.023
The temperature difference between the supply and return is excessive.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. The boiler detects an excessive difference between supply and return. It is not the same warning as a rapid temperature rise.
What can you observe? Indicate whether it occurs when requesting heating or hot water and if the radiators were heating. Do not manipulate the pump or the sensors.
CodeF.024
The temperature increase is too rapid.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. The relevant factor is the speed at which the temperature increases, not just its final value.
What can you observe? Note how long it takes to appear from the demand and what temperature the display shows, if accessible.
CodeF.025
The temperature of the combustion gases is too high.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. It is a warning from the combustion control or flame detection system. It requires checking its cause before choosing a spare part.
What can you observe? Indicate whether it appears when starting or after heating. Do not intervene in gas, electrodes, or combustion adjustments.
CodeF.027
A flame signal was detected and the burner is off.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. It is a warning from the combustion control or flame detection system. It requires checking its cause before choosing a spare part.
What can you observe? Indicate whether it appears when starting or after heating. Do not intervene in gas, electrodes, or combustion adjustments.
CodeF.028
During the ignition phase, the flame signal was not detected.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. The ignition does not establish the flame when starting. It is different from a fault occurring during an already established flame.
What can you observe? Indicate whether it occurs when opening a hot tap, when requesting heating, or in both cases. Do not force the start with repeated resets.
CodeF.029
The ignition failed due to lack of flame during operation.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. The flame goes out during operation. The moment of the cut helps to differentiate it from an initial ignition fault.
What can you observe? Note whether the equipment had heated before stopping and if it happens consistently or intermittently. Do not check gas components.
CodeF.032
The fan speed is out of tolerance.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. This meaning corresponds to the indicated variant and its manual. The code guides the diagnosis, but does not confirm a spare part.
What can you observe? Please provide a photo of the warning, the equipment reference, and when it appears: during startup, in heating mode, or with hot water.
CodeF.035
The air intake/exhaust duct is blocked.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. It is a warning from the combustion control or flame detection system. It requires checking its cause before choosing a spare part.
What can you observe? Indicate whether it appears when starting or after heating. Do not intervene in gas, electrodes, or combustion adjustments.
CodeF.040
The air excess factor is too low.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. This meaning corresponds to the indicated variant and its manual. The code guides the diagnosis, but does not confirm a spare part.
What can you observe? Please provide a photo of the warning, the equipment reference, and when it appears: during startup, in heating mode, or with hot water.
CodeF.042
The coding resistor (in the wiring harness) or the gas group resistor (on the PCB if it exists) is not valid.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. It is a warning from the combustion control or flame detection system. It requires checking its cause before choosing a spare part.
What can you observe? Indicate whether it appears when starting or after heating. Do not intervene in gas, electrodes, or combustion adjustments.
CodeF.044
The ionization signal of the regulation electrode is too low. The drift adaptation has failed.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. It is a warning from the combustion control or flame detection system. It requires checking its cause before choosing a spare part.
What can you observe? Indicate whether it appears when starting or after heating. Do not intervene in gas, electrodes, or combustion adjustments.
CodeF.047
The signal from the domestic hot water temperature sensor at the outlet of the internal accumulator is not plausible.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. The warning identifies a signal or measurement that needs to be checked; it does not, by itself, indicate that the sensor needs to be replaced.
What can you observe? Keep a photo of the code and any indicated temperature or pressure. Do not disconnect sensors or bridge connections.
CodeF.049
The eBUS is short-circuited or two active eBUS sources have reversed polarity.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. The warning relates to the control, its communications, or its configuration. It is not sufficient to confirm a faulty PCB.
What can you observe? Indicate if it appeared after a power cut, an intervention, or a change of control. Do not modify installer parameters.
CodeF.057
The combustion regulation has failed and so has the corresponding emergency mode.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. It is a warning from the combustion control or flame detection system. It requires checking its cause before choosing a spare part.
What can you observe? Indicate whether it appears when starting or after heating. Do not intervene in gas, electrodes, or combustion adjustments.
CodeF.061
ASIC or µController does not operate within the defined time limits.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. This meaning corresponds to the indicated variant and its manual. The code guides the diagnosis, but does not confirm a spare part.
What can you observe? Please provide a photo of the warning, the equipment reference, and when it appears: during startup, in heating mode, or with hot water.
CodeF.062
The flame disconnection is detected with a delay.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. It is a warning from the combustion control or flame detection system. It requires checking its cause before choosing a spare part.
What can you observe? Indicate whether it appears when starting or after heating. Do not intervene in gas, electrodes, or combustion adjustments.
CodeF.063
EEPROM warns of an error during the read and write test.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. The warning relates to the control, its communications, or its configuration. It is not sufficient to confirm a faulty PCB.
What can you observe? Indicate if it appeared after a power cut, an intervention, or a change of control. Do not modify installer parameters.
CodeF.064
The sensor signal could not be converted correctly.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. The warning identifies a signal or measurement that needs to be checked; it does not, by itself, indicate that the sensor needs to be replaced.
What can you observe? Keep a photo of the code and any indicated temperature or pressure. Do not disconnect sensors or bridge connections.
CodeF.065
The operating temperature range of an electronic component has been exceeded.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. The control has detected a temperature condition. The code and the moment it appears must be evaluated together.
What can you observe? Note the displayed temperature and whether the heating or hot water was functioning. Do not disable protections.
CodeF.067
The flame controller is faulty.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. It is a warning from the combustion control or flame detection system. It requires checking its cause before choosing a spare part.
What can you observe? Indicate whether it appears when starting or after heating. Do not intervene in gas, electrodes, or combustion adjustments.
CodeF.068
The flame controller reports an unstable signal.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. It is a warning from the combustion control or flame detection system. It requires checking its cause before choosing a spare part.
What can you observe? Indicate whether it appears when starting or after heating. Do not intervene in gas, electrodes, or combustion adjustments.
CodeF.070
The device identification (DSN) is incorrect, missing, or does not match the coding resistance.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. The warning relates to the control, its communications, or its configuration. It is not sufficient to confirm a faulty PCB.
What can you observe? Indicate if it appeared after a power cut, an intervention, or a change of control. Do not modify installer parameters.
CodeF.071
The supply temperature sensor records implausible values.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. The warning identifies a signal or measurement that needs to be checked; it does not, by itself, indicate that the sensor needs to be replaced.
What can you observe? Keep a photo of the code and any indicated temperature or pressure. Do not disconnect sensors or bridge connections.
CodeF.072
The temperature difference between the supply and return temperature sensors is not valid.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. The warning identifies a signal or measurement that needs to be checked; it does not, by itself, indicate that the sensor needs to be replaced.
What can you observe? Keep a photo of the code and any indicated temperature or pressure. Do not disconnect sensors or bridge connections.
CodeF.074
The signal from the water pressure sensor is interrupted.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. The warning identifies a signal or measurement that needs to be checked; it does not, by itself, indicate that the sensor needs to be replaced.
What can you observe? Keep a photo of the code and any indicated temperature or pressure. Do not disconnect sensors or bridge connections.
CodeF.075
The pressure jump at the start of the heating pump is too low.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. The control does not detect the expected pressure change when starting the pump; the code does not confirm which component is causing it.
What can you observe? Note the indicated pressure before the warning and if it appears when starting the demand. The check of the pump, sensor, and circuit is the technician's responsibility.
CodeF.076
The overheating protection of the primary heat exchanger is active.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. The control has detected a temperature condition. The code and the moment it appears must be evaluated together.
What can you observe? Note the displayed temperature and whether the heating or hot water was functioning. Do not disable protections.
CodeF.077
A condensate pump or a flue gas non-return valve block the operation of the burner.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. It is a warning from the combustion control or flame detection system. It requires checking its cause before choosing a spare part.
What can you observe? Indicate whether it appears when starting or after heating. Do not intervene in gas, electrodes, or combustion adjustments.
CodeF.078
The control module is not supported by the device.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. This meaning corresponds to the indicated variant and its manual. The code guides the diagnosis, but does not confirm a spare part.
What can you observe? Please provide a photo of the warning, the equipment reference, and when it appears: during startup, in heating mode, or with hot water.
CodeF.080
The cold water inlet temperature sensor in the internal storage tank is faulty.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. The warning identifies a signal or measurement that needs to be checked; it does not, by itself, indicate that the sensor needs to be replaced.
What can you observe? Keep a photo of the code and any indicated temperature or pressure. Do not disconnect sensors or bridge connections.
CodeF.081
The boost has failed.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. This meaning corresponds to the indicated variant and its manual. The code guides the diagnosis, but does not confirm a spare part.
What can you observe? Please provide a photo of the warning, the equipment reference, and when it appears: during startup, in heating mode, or with hot water.
CodeF.083
When starting the burner, no increase in temperature is recorded, or an increase is recorded too slowly on the supply or return temperature sensor.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. The warning identifies a signal or measurement that needs to be checked; it does not, by itself, indicate that the sensor needs to be replaced.
What can you observe? Keep a photo of the code and any indicated temperature or pressure. Do not disconnect sensors or bridge connections.
CodeF.084
The temperature difference between the supply and return temperature sensor results in implausible values.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. The warning identifies a signal or measurement that needs to be checked; it does not, by itself, indicate that the sensor needs to be replaced.
What can you observe? Keep a photo of the code and any indicated temperature or pressure. Do not disconnect sensors or bridge connections.
CodeF.085
The NTC sensors are incorrectly mounted.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. The warning identifies a signal or measurement that needs to be checked; it does not, by itself, indicate that the sensor needs to be replaced.
What can you observe? Keep a photo of the code and any indicated temperature or pressure. Do not disconnect sensors or bridge connections.
CodeF.087
The ignition transformer is not connected to the PCB.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. It is a warning from the combustion control or flame detection system. It requires checking its cause before choosing a spare part.
What can you observe? Indicate whether it appears when starting or after heating. Do not intervene in gas, electrodes, or combustion adjustments.
CodeF.088
The electrical connection with the gas valve has been interrupted.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. It is a warning from the combustion control or flame detection system. It requires checking its cause before choosing a spare part.
What can you observe? Indicate whether it appears when starting or after heating. Do not intervene in gas, electrodes, or combustion adjustments.
CodeF.089
The integrated heating pump is not suitable for the appliance model.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. The warning must be interpreted along with the circuit status and the equipment readings; it does not indicate a specific part by itself.
What can you observe? Note the visible pressure and the affected service. The internal circuit check is the responsibility of the professional.
CodeF.090
The communication with the internal accumulator is interrupted.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. The warning relates to the control, its communications, or its configuration. It is not sufficient to confirm a faulty PCB.
What can you observe? Indicate if it appeared after a power cut, an intervention, or a change of control. Do not modify installer parameters.
CodeF.092
The gas type change has not been completed correctly.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. It is a warning from the combustion control or flame detection system. It requires checking its cause before choosing a spare part.
What can you observe? Indicate whether it appears when starting or after heating. Do not intervene in gas, electrodes, or combustion adjustments.
CodeF.095
The stepper motor of the gas valve has reached the minimum allowed number of steps.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. It is a warning from the combustion control or flame detection system. It requires checking its cause before choosing a spare part.
What can you observe? Indicate whether it appears when starting or after heating. Do not intervene in gas, electrodes, or combustion adjustments.
CodeF.096
The stepper motor of the gas valve has reached the maximum allowed number of steps.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. It is a warning from the combustion control or flame detection system. It requires checking its cause before choosing a spare part.
What can you observe? Indicate whether it appears when starting or after heating. Do not intervene in gas, electrodes, or combustion adjustments.
CodeF.097
The self-check of the main PCB has failed.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. The warning relates to the control, its communications, or its configuration. It is not sufficient to confirm a faulty PCB.
What can you observe? Indicate if it appeared after a power cut, an intervention, or a change of control. Do not modify installer parameters.
CodeF.105
When replacing a gas valve or a printed circuit board and the display simultaneously, it will be necessary to adjust the gas valve deviation to match that of the current gas valve.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. It is a warning from the combustion control or flame detection system. It requires checking its cause before choosing a spare part.
What can you observe? Indicate whether it appears when starting or after heating. Do not intervene in gas, electrodes, or combustion adjustments.
CodeF.110
A correct ignition could not be detected with the enriched air and gas mixture.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. It is a warning from the combustion control or flame detection system. It requires checking its cause before choosing a spare part.
What can you observe? Indicate whether it appears when starting or after heating. Do not intervene in gas, electrodes, or combustion adjustments.
CodeF.194
The power supply of the PCB is faulty.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. The warning relates to the control, its communications, or its configuration. It is not sufficient to confirm a faulty PCB.
What can you observe? Indicate if it appeared after a power cut, an intervention, or a change of control. Do not modify installer parameters.
CodeF.195
The device has detected a significant undervoltage in the power supply.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. The warning relates to the control, its communications, or its configuration. It is not sufficient to confirm a faulty PCB.
What can you observe? Indicate if it appeared after a power cut, an intervention, or a change of control. Do not modify installer parameters.
CodeF.196
The device has detected a significant overvoltage in the power supply.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. The warning relates to the control, its communications, or its configuration. It is not sufficient to confirm a faulty PCB.
What can you observe? Indicate if it appeared after a power cut, an intervention, or a change of control. Do not modify installer parameters.
CodeF.228
The device was in emergency mode. In that state, it could not be turned on during the ignition phase.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. It is a warning from the combustion control or flame detection system. It requires checking its cause before choosing a spare part.
What can you observe? Indicate whether it appears when starting or after heating. Do not intervene in gas, electrodes, or combustion adjustments.
CodeF.229
The device was in emergency mode. In that state, it could not ignite due to a flame failure.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. It is a warning from the combustion control or flame detection system. It requires checking its cause before choosing a spare part.
What can you observe? Indicate whether it appears when starting or after heating. Do not intervene in gas, electrodes, or combustion adjustments.
CodeF.281
The flame has failed during the stabilization period.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. It is a warning from the combustion control or flame detection system. It requires checking its cause before choosing a spare part.
What can you observe? Indicate whether it appears when starting or after heating. Do not intervene in gas, electrodes, or combustion adjustments.
CodeF.291
The flame has failed during the stabilization time due to a flame loss during operation.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. It is a warning from the combustion control or flame detection system. It requires checking its cause before choosing a spare part.
What can you observe? Indicate whether it appears when starting or after heating. Do not intervene in gas, electrodes, or combustion adjustments.
CodeF.317
The flow sensor signal in the domestic hot water circuit is not plausible.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. The warning identifies a signal or measurement that needs to be checked; it does not, by itself, indicate that the sensor needs to be replaced.
What can you observe? Keep a photo of the code and any indicated temperature or pressure. Do not disconnect sensors or bridge connections.
CodeF.318
The 3-way motorised valve is not moving.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. This meaning corresponds to the indicated variant and its manual. The code guides the diagnosis, but does not confirm a spare part.
What can you observe? Please provide a photo of the warning, the equipment reference, and when it appears: during startup, in heating mode, or with hot water.
CodeF.320
The heating pump is blocked. The unblocking function was not successful.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. This meaning corresponds to the indicated variant and its manual. The code guides the diagnosis, but does not confirm a spare part.
What can you observe? Please provide a photo of the warning, the equipment reference, and when it appears: during startup, in heating mode, or with hot water.
CodeF.321
The pump electronics are faulty.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. The warning relates to the control, its communications, or its configuration. It is not sufficient to confirm a faulty PCB.
What can you observe? Indicate if it appeared after a power cut, an intervention, or a change of control. Do not modify installer parameters.
CodeF.322
The heating pump is overheating. The emergency operation has not been able to reduce the temperature.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. The control has detected a temperature condition. The code and the moment it appears must be evaluated together.
What can you observe? Note the displayed temperature and whether the heating or hot water was functioning. Do not disable protections.
CodeF.323
The heating pump is running dry.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. The warning must be interpreted along with the circuit status and the equipment readings; it does not indicate a specific part by itself.
What can you observe? Note the visible pressure and the affected service. The internal circuit check is the responsibility of the professional.
CodeF.324
The electrical connection of the pumps has been interrupted.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. The warning must be interpreted along with the circuit status and the equipment readings; it does not indicate a specific part by itself.
What can you observe? Note the visible pressure and the affected service. The internal circuit check is the responsibility of the professional.
CodeF.325
The heating pump has a fault.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. The warning must be interpreted along with the circuit status and the equipment readings; it does not indicate a specific part by itself.
What can you observe? Note the visible pressure and the affected service. The internal circuit check is the responsibility of the professional.
CodeF.326
The hydraulic test of the sensor and the actuator has determined that at least two hydraulic components are not functioning.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. The warning identifies a signal or measurement that needs to be checked; it does not, by itself, indicate that the sensor needs to be replaced.
What can you observe? Keep a photo of the code and any indicated temperature or pressure. Do not disconnect sensors or bridge connections.
CodeF.327
Due to a domestic hot water circuit not connected, the minimum volumetric flow rate of the heating is limited.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. The warning must be interpreted along with the circuit status and the equipment readings; it does not indicate a specific part by itself.
What can you observe? Note the visible pressure and the affected service. The internal circuit check is the responsibility of the professional.
CodeF.330
The pump does not respond to commands during the hydraulic test.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. The warning must be interpreted along with the circuit status and the equipment readings; it does not indicate a specific part by itself.
What can you observe? Note the visible pressure and the affected service. The internal circuit check is the responsibility of the professional.
CodeF.334
The configuration of the combustion gas exhaust installation has not been completed.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. It is a warning from the combustion control or flame detection system. It requires checking its cause before choosing a spare part.
What can you observe? Indicate whether it appears when starting or after heating. Do not intervene in gas, electrodes, or combustion adjustments.
CodeF.336
The device is not allowed in this configuration.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. The warning relates to the control, its communications, or its configuration. It is not sufficient to confirm a faulty PCB.
What can you observe? Indicate if it appeared after a power cut, an intervention, or a change of control. Do not modify installer parameters.
CodeF.337
The multiple gas outlet conversion kit does not fit the heat cell.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. It is a warning from the combustion control or flame detection system. It requires checking its cause before choosing a spare part.
What can you observe? Indicate whether it appears when starting or after heating. Do not intervene in gas, electrodes, or combustion adjustments.
CodeF.338
Incorrect multiple occupancy allocation adjustment
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. This meaning corresponds to the indicated variant and its manual. The code guides the diagnosis, but does not confirm a spare part.
What can you observe? Please provide a photo of the warning, the equipment reference, and when it appears: during startup, in heating mode, or with hot water.
CodeF.342
The air flow sensor is not within the permitted limits.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. The warning identifies a signal or measurement that needs to be checked; it does not, by itself, indicate that the sensor needs to be replaced.
What can you observe? Keep a photo of the code and any indicated temperature or pressure. Do not disconnect sensors or bridge connections.
CodeF.343
The signal from the mass air flow sensor is not plausible.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. The warning identifies a signal or measurement that needs to be checked; it does not, by itself, indicate that the sensor needs to be replaced.
What can you observe? Keep a photo of the code and any indicated temperature or pressure. Do not disconnect sensors or bridge connections.
CodeF.344
The regulation electrode cannot continue to be used.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. This meaning corresponds to the indicated variant and its manual. The code guides the diagnosis, but does not confirm a spare part.
What can you observe? Please provide a photo of the warning, the equipment reference, and when it appears: during startup, in heating mode, or with hot water.
CodeF.347
Condensate has been detected in the combustion chamber. The operation of the burner will be interrupted.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. It is a warning from the combustion control or flame detection system. It requires checking its cause before choosing a spare part.
What can you observe? Indicate whether it appears when starting or after heating. Do not intervene in gas, electrodes, or combustion adjustments.
CodeF.363
The EEPROM on the display warns of an error during the read and write test.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. The warning relates to the control, its communications, or its configuration. It is not sufficient to confirm a faulty PCB.
What can you observe? Indicate if it appeared after a power cut, an intervention, or a change of control. Do not modify installer parameters.
CodeF.707
It is not possible to establish any communication between the display and the PCB.
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. The warning relates to the control, its communications, or its configuration. It is not sufficient to confirm a faulty PCB.
What can you observe? Indicate if it appeared after a power cut, an intervention, or a change of control. Do not modify installer parameters.
CodeF.905
Communication interface disconnected
ecoTEC plus CS/1-5 VMW 23/26/32/36 CS/1-5.
How to interpret it. The warning relates to the control, its communications, or its configuration. It is not sufficient to confirm a faulty PCB.
What can you observe? Indicate if it appeared after a power cut, an intervention, or a change of control. Do not modify installer parameters.
ecoTEC pro
VMW 236/5-3 and 286/5-3 H-ES · Manual 0020244989_04.
The table in the manual may include variants and accessories that your unit does not come with. Please confirm its full designation.
33 documented entries
CodeF.00
Interruption of the flow temperature sensor
ecoTEC pro VMW 236/5-3 and 286/5-3 H-ES.
How to interpret it. The warning identifies a signal or measurement that needs to be checked; it does not, by itself, indicate that the sensor needs to be replaced.
What can you observe? Keep a photo of the code and any indicated temperature or pressure. Do not disconnect sensors or bridge connections.
CodeF.01
Interruption of the return temperature sensor
ecoTEC pro VMW 236/5-3 and 286/5-3 H-ES.
How to interpret it. The warning identifies a signal or measurement that needs to be checked; it does not, by itself, indicate that the sensor needs to be replaced.
What can you observe? Keep a photo of the code and any indicated temperature or pressure. Do not disconnect sensors or bridge connections.
CodeF.10
Short circuit of the supply temperature sensor
ecoTEC pro VMW 236/5-3 and 286/5-3 H-ES.
How to interpret it. The warning identifies a signal or measurement that needs to be checked; it does not, by itself, indicate that the sensor needs to be replaced.
What can you observe? Keep a photo of the code and any indicated temperature or pressure. Do not disconnect sensors or bridge connections.
CodeF.11
Return temperature sensor short circuit
ecoTEC pro VMW 236/5-3 and 286/5-3 H-ES.
How to interpret it. The warning identifies a signal or measurement that needs to be checked; it does not, by itself, indicate that the sensor needs to be replaced.
What can you observe? Keep a photo of the code and any indicated temperature or pressure. Do not disconnect sensors or bridge connections.
CodeF.20
Safety temperature limiter disconnection.
ecoTEC pro VMW 236/5-3 and 286/5-3 H-ES.
How to interpret it. The control has detected a temperature condition. The code and the moment it appears must be evaluated together.
What can you observe? Note the displayed temperature and whether the heating or hot water was functioning. Do not disable protections.
CodeF.22
Safety disconnection due to lack of water
ecoTEC pro VMW 236/5-3 and 286/5-3 H-ES.
How to interpret it. The warning refers to the water in the circuit; it does not independently identify a leak or a faulty pump.
What can you observe? Note the visible pressure and whether it has changed since the last use. Indicate if you see water under the equipment, without opening it or filling it by trial.
CodeF.23
High differential temperature safety disconnection
ecoTEC pro VMW 236/5-3 and 286/5-3 H-ES.
How to interpret it. The boiler detects an excessive difference between supply and return. It is not the same warning as a rapid temperature rise.
What can you observe? Indicate whether it occurs when requesting heating or hot water and if the radiators were heating. Do not manipulate the pump or the sensors.
CodeF.24
Safety lockout due to excessively rapid temperature increase
ecoTEC pro VMW 236/5-3 and 286/5-3 H-ES.
How to interpret it. The relevant factor is the speed at which the temperature increases, not just its final value.
What can you observe? Note how long it takes to appear from the demand and what temperature the display shows, if accessible.
CodeF.25
Safety disconnect for high gas temperature.
ecoTEC pro VMW 236/5-3 and 286/5-3 H-ES.
How to interpret it. It is a warning from the combustion control or flame detection system. It requires checking its cause before choosing a spare part.
What can you observe? Indicate whether it appears when starting or after heating. Do not intervene in gas, electrodes, or combustion adjustments.
CodeF.26
Fault: combustion valve not working
ecoTEC pro VMW 236/5-3 and 286/5-3 H-ES.
How to interpret it. It is a warning from the combustion control or flame detection system. It requires checking its cause before choosing a spare part.
What can you observe? Indicate whether it appears when starting or after heating. Do not intervene in gas, electrodes, or combustion adjustments.
CodeF.27
Flame simulation safety disconnection
ecoTEC pro VMW 236/5-3 and 286/5-3 H-ES.
How to interpret it. It is a warning from the combustion control or flame detection system. It requires checking its cause before choosing a spare part.
What can you observe? Indicate whether it appears when starting or after heating. Do not intervene in gas, electrodes, or combustion adjustments.
CodeF.28
Fault in ignition start failed
ecoTEC pro VMW 236/5-3 and 286/5-3 H-ES.
How to interpret it. The ignition does not establish the flame when starting. It is different from a fault occurring during an already established flame.
What can you observe? Indicate whether it occurs when opening a hot tap, when requesting heating, or in both cases. Do not force the start with repeated resets.
CodeF.29
Fault in operation: failed ignition
ecoTEC pro VMW 236/5-3 and 286/5-3 H-ES.
How to interpret it. The flame goes out during operation. The moment of the cut helps to differentiate it from an initial ignition fault.
What can you observe? Note whether the equipment had heated before stopping and if it happens consistently or intermittently. Do not check gas components.
CodeF.32
Fan fault
ecoTEC pro VMW 236/5-3 and 286/5-3 H-ES.
How to interpret it. This meaning corresponds to the indicated variant and its manual. The code guides the diagnosis, but does not confirm a spare part.
What can you observe? Please provide a photo of the warning, the equipment reference, and when it appears: during startup, in heating mode, or with hot water.
CodeF.49
eBUS fault
ecoTEC pro VMW 236/5-3 and 286/5-3 H-ES.
How to interpret it. The warning relates to the control, its communications, or its configuration. It is not sufficient to confirm a faulty PCB.
What can you observe? Indicate if it appeared after a power cut, an intervention, or a change of control. Do not modify installer parameters.
CodeF.61
Fuel valve control fault
ecoTEC pro VMW 236/5-3 and 286/5-3 H-ES.
How to interpret it. It is a warning from the combustion control or flame detection system. It requires checking its cause before choosing a spare part.
What can you observe? Indicate whether it appears when starting or after heating. Do not intervene in gas, electrodes, or combustion adjustments.
CodeF.62
Fuel valve disconnection delay fault
ecoTEC pro VMW 236/5-3 and 286/5-3 H-ES.
How to interpret it. It is a warning from the combustion control or flame detection system. It requires checking its cause before choosing a spare part.
What can you observe? Indicate whether it appears when starting or after heating. Do not intervene in gas, electrodes, or combustion adjustments.
CodeF.63
EEPROM fault
ecoTEC pro VMW 236/5-3 and 286/5-3 H-ES.
How to interpret it. The warning relates to the control, its communications, or its configuration. It is not sufficient to confirm a faulty PCB.
What can you observe? Indicate if it appeared after a power cut, an intervention, or a change of control. Do not modify installer parameters.
CodeF.64
Electronic fault / sensor
ecoTEC pro VMW 236/5-3 and 286/5-3 H-ES.
How to interpret it. The warning identifies a signal or measurement that needs to be checked; it does not, by itself, indicate that the sensor needs to be replaced.
What can you observe? Keep a photo of the code and any indicated temperature or pressure. Do not disconnect sensors or bridge connections.
CodeF.65
Electronic temp. fault
ecoTEC pro VMW 236/5-3 and 286/5-3 H-ES.
How to interpret it. The warning relates to the control, its communications, or its configuration. It is not sufficient to confirm a faulty PCB.
What can you observe? Indicate if it appeared after a power cut, an intervention, or a change of control. Do not modify installer parameters.
CodeF.67
Electronic/flame fault
ecoTEC pro VMW 236/5-3 and 286/5-3 H-ES.
How to interpret it. It is a warning from the combustion control or flame detection system. It requires checking its cause before choosing a spare part.
What can you observe? Indicate whether it appears when starting or after heating. Do not intervene in gas, electrodes, or combustion adjustments.
CodeF.68
Fault: unstable flame signal
ecoTEC pro VMW 236/5-3 and 286/5-3 H-ES.
How to interpret it. It is a warning from the combustion control or flame detection system. It requires checking its cause before choosing a spare part.
What can you observe? Indicate whether it appears when starting or after heating. Do not intervene in gas, electrodes, or combustion adjustments.
CodeF.70
Fault: invalid appliance code
ecoTEC pro VMW 236/5-3 and 286/5-3 H-ES.
How to interpret it. This meaning corresponds to the indicated variant and its manual. The code guides the diagnosis, but does not confirm a spare part.
What can you observe? Please provide a photo of the warning, the equipment reference, and when it appears: during startup, in heating mode, or with hot water.
CodeF.71
Fault of the flow temperature sensor
ecoTEC pro VMW 236/5-3 and 286/5-3 H-ES.
How to interpret it. The warning identifies a signal or measurement that needs to be checked; it does not, by itself, indicate that the sensor needs to be replaced.
What can you observe? Keep a photo of the code and any indicated temperature or pressure. Do not disconnect sensors or bridge connections.
CodeF.72
Temperature sensor fault for supply/return
ecoTEC pro VMW 236/5-3 and 286/5-3 H-ES.
How to interpret it. The warning identifies a signal or measurement that needs to be checked; it does not, by itself, indicate that the sensor needs to be replaced.
What can you observe? Keep a photo of the code and any indicated temperature or pressure. Do not disconnect sensors or bridge connections.
CodeF.73
Water pressure sensor fault (Signal too low)
ecoTEC pro VMW 236/5-3 and 286/5-3 H-ES.
How to interpret it. The warning identifies a signal or measurement that needs to be checked; it does not, by itself, indicate that the sensor needs to be replaced.
What can you observe? Keep a photo of the code and any indicated temperature or pressure. Do not disconnect sensors or bridge connections.
CodeF.74
Water pressure sensor fault (Signal too high)
ecoTEC pro VMW 236/5-3 and 286/5-3 H-ES.
How to interpret it. The warning identifies a signal or measurement that needs to be checked; it does not, by itself, indicate that the sensor needs to be replaced.
What can you observe? Keep a photo of the code and any indicated temperature or pressure. Do not disconnect sensors or bridge connections.
CodeF.75
Pump fault/lack of water
ecoTEC pro VMW 236/5-3 and 286/5-3 H-ES.
How to interpret it. The control does not detect the expected pressure change when starting the pump; the code does not confirm which component is causing it.
What can you observe? Note the indicated pressure before the warning and if it appears when starting the demand. The check of the pump, sensor, and circuit is the technician's responsibility.
CodeF.77
Fault: flue damper/ condensate pump
ecoTEC pro VMW 236/5-3 and 286/5-3 H-ES.
How to interpret it. It is a warning from the combustion control or flame detection system. It requires checking its cause before choosing a spare part.
What can you observe? Indicate whether it appears when starting or after heating. Do not intervene in gas, electrodes, or combustion adjustments.
CodeF.78
Interruption. domestic hot water outlet sensor in external controller.
ecoTEC pro VMW 236/5-3 and 286/5-3 H-ES.
How to interpret it. The warning identifies a signal or measurement that needs to be checked; it does not, by itself, indicate that the sensor needs to be replaced.
What can you observe? Keep a photo of the code and any indicated temperature or pressure. Do not disconnect sensors or bridge connections.
CodeF.83
NTC fault temperature change.
ecoTEC pro VMW 236/5-3 and 286/5-3 H-ES.
How to interpret it. The warning identifies a signal or measurement that needs to be checked; it does not, by itself, indicate that the sensor needs to be replaced.
What can you observe? Keep a photo of the code and any indicated temperature or pressure. Do not disconnect sensors or bridge connections.
CodeF.84
Fault NTC: implausible temperature difference
ecoTEC pro VMW 236/5-3 and 286/5-3 H-ES.
How to interpret it. The warning identifies a signal or measurement that needs to be checked; it does not, by itself, indicate that the sensor needs to be replaced.
What can you observe? Keep a photo of the code and any indicated temperature or pressure. Do not disconnect sensors or bridge connections.
CodeF.85
Fault NTC poorly installed
ecoTEC pro VMW 236/5-3 and 286/5-3 H-ES.
How to interpret it. The warning identifies a signal or measurement that needs to be checked; it does not, by itself, indicate that the sensor needs to be replaced.
What can you observe? Keep a photo of the code and any indicated temperature or pressure. Do not disconnect sensors or bridge connections.
ecoTEC pure
VMW 236/7-2 and 286/7-2 H-ES · Manual 0020231732_02.
The table in the manual may include variants and accessories that your unit does not come with. Please confirm its full designation.
35 documented entries
CodeF.00
Fault: flow temperature sensor
ecoTEC pure VMW 236/7-2 and 286/7-2 H-ES.
How to interpret it. The warning identifies a signal or measurement that needs to be checked; it does not, by itself, indicate that the sensor needs to be replaced.
What can you observe? Keep a photo of the code and any indicated temperature or pressure. Do not disconnect sensors or bridge connections.
CodeF.01
Fault: return temperature sensor
ecoTEC pure VMW 236/7-2 and 286/7-2 H-ES.
How to interpret it. The warning identifies a signal or measurement that needs to be checked; it does not, by itself, indicate that the sensor needs to be replaced.
What can you observe? Keep a photo of the code and any indicated temperature or pressure. Do not disconnect sensors or bridge connections.
CodeF.10
Short circuit: flow temperature sensor
ecoTEC pure VMW 236/7-2 and 286/7-2 H-ES.
How to interpret it. The warning identifies a signal or measurement that needs to be checked; it does not, by itself, indicate that the sensor needs to be replaced.
What can you observe? Keep a photo of the code and any indicated temperature or pressure. Do not disconnect sensors or bridge connections.
CodeF.11
Short circuit: return temperature sensor
ecoTEC pure VMW 236/7-2 and 286/7-2 H-ES.
How to interpret it. The warning identifies a signal or measurement that needs to be checked; it does not, by itself, indicate that the sensor needs to be replaced.
What can you observe? Keep a photo of the code and any indicated temperature or pressure. Do not disconnect sensors or bridge connections.
CodeF.13
Short circuit: domestic hot water accumulator temperature sensor
ecoTEC pure VMW 236/7-2 and 286/7-2 H-ES.
How to interpret it. The warning identifies a signal or measurement that needs to be checked; it does not, by itself, indicate that the sensor needs to be replaced.
What can you observe? Keep a photo of the code and any indicated temperature or pressure. Do not disconnect sensors or bridge connections.
CodeF.20
Safety shutdown: overheating temperature reached
ecoTEC pure VMW 236/7-2 and 286/7-2 H-ES.
How to interpret it. The control has detected a temperature condition. The code and the moment it appears must be evaluated together.
What can you observe? Note the displayed temperature and whether the heating or hot water was functioning. Do not disable protections.
CodeF.22
/ 0.0 bar
ecoTEC pure VMW 236/7-2 and 286/7-2 H-ES.
How to interpret it. The warning refers to the water in the circuit; it does not independently identify a leak or a faulty pump.
What can you observe? Note the visible pressure and whether it has changed since the last use. Indicate if you see water under the equipment, without opening it or filling it by trial.
CodeF.23
Safety shutdown: temperature variation too large (NTC1/NTC2)
ecoTEC pure VMW 236/7-2 and 286/7-2 H-ES.
How to interpret it. The boiler detects an excessive difference between supply and return. It is not the same warning as a rapid temperature rise.
What can you observe? Indicate whether it occurs when requesting heating or hot water and if the radiators were heating. Do not manipulate the pump or the sensors.
CodeF.24
Safety shutdown: temperature rise too fast
ecoTEC pure VMW 236/7-2 and 286/7-2 H-ES.
How to interpret it. The relevant factor is the speed at which the temperature increases, not just its final value.
What can you observe? Note how long it takes to appear from the demand and what temperature the display shows, if accessible.
CodeF.27
Safety disconnection: flame detection error
ecoTEC pure VMW 236/7-2 and 286/7-2 H-ES.
How to interpret it. It is a warning from the combustion control or flame detection system. It requires checking its cause before choosing a spare part.
What can you observe? Indicate whether it appears when starting or after heating. Do not intervene in gas, electrodes, or combustion adjustments.
CodeF.28
Fault: unsuccessful ignition on start-up
ecoTEC pure VMW 236/7-2 and 286/7-2 H-ES.
How to interpret it. The ignition does not establish the flame when starting. It is different from a fault occurring during an already established flame.
What can you observe? Indicate whether it occurs when opening a hot tap, when requesting heating, or in both cases. Do not force the start with repeated resets.
CodeF.29
Fault: flame loss
ecoTEC pure VMW 236/7-2 and 286/7-2 H-ES.
How to interpret it. The flame goes out during operation. The moment of the cut helps to differentiate it from an initial ignition fault.
What can you observe? Note whether the equipment had heated before stopping and if it happens consistently or intermittently. Do not check gas components.
CodeF.32
Fan test function active: the fan revolutions exceed the tolerance values.
ecoTEC pure VMW 236/7-2 and 286/7-2 H-ES.
How to interpret it. This meaning corresponds to the indicated variant and its manual. The code guides the diagnosis, but does not confirm a spare part.
What can you observe? Please provide a photo of the warning, the equipment reference, and when it appears: during startup, in heating mode, or with hot water.
CodeF.46
Short circuit: temperature sensor at the water inlet of the solar circuit
ecoTEC pure VMW 236/7-2 and 286/7-2 H-ES.
How to interpret it. The warning identifies a signal or measurement that needs to be checked; it does not, by itself, indicate that the sensor needs to be replaced.
What can you observe? Keep a photo of the code and any indicated temperature or pressure. Do not disconnect sensors or bridge connections.
CodeF.49
eBUS error: current too low
ecoTEC pure VMW 236/7-2 and 286/7-2 H-ES.
How to interpret it. The warning relates to the control, its communications, or its configuration. It is not sufficient to confirm a faulty PCB.
What can you observe? Indicate if it appeared after a power cut, an intervention, or a change of control. Do not modify installer parameters.
CodeF.61
Error: gas valve control
ecoTEC pure VMW 236/7-2 and 286/7-2 H-ES.
How to interpret it. It is a warning from the combustion control or flame detection system. It requires checking its cause before choosing a spare part.
What can you observe? Indicate whether it appears when starting or after heating. Do not intervene in gas, electrodes, or combustion adjustments.
CodeF.62
Error: gas valve disconnection controller
ecoTEC pure VMW 236/7-2 and 286/7-2 H-ES.
How to interpret it. It is a warning from the combustion control or flame detection system. It requires checking its cause before choosing a spare part.
What can you observe? Indicate whether it appears when starting or after heating. Do not intervene in gas, electrodes, or combustion adjustments.
CodeF.63
Error: EEPROM
ecoTEC pure VMW 236/7-2 and 286/7-2 H-ES.
How to interpret it. The warning relates to the control, its communications, or its configuration. It is not sufficient to confirm a faulty PCB.
What can you observe? Indicate if it appeared after a power cut, an intervention, or a change of control. Do not modify installer parameters.
CodeF.64
Fault: PCB / sensor / analog to digital transformer
ecoTEC pure VMW 236/7-2 and 286/7-2 H-ES.
How to interpret it. The warning identifies a signal or measurement that needs to be checked; it does not, by itself, indicate that the sensor needs to be replaced.
What can you observe? Keep a photo of the code and any indicated temperature or pressure. Do not disconnect sensors or bridge connections.
CodeF.65
Error: electronics temperature too high
ecoTEC pure VMW 236/7-2 and 286/7-2 H-ES.
How to interpret it. The control has detected a temperature condition. The code and the moment it appears must be evaluated together.
What can you observe? Note the displayed temperature and whether the heating or hot water was functioning. Do not disable protections.
CodeF.67
Incorrect return value from ASIC (flame signal)
ecoTEC pure VMW 236/7-2 and 286/7-2 H-ES.
How to interpret it. It is a warning from the combustion control or flame detection system. It requires checking its cause before choosing a spare part.
What can you observe? Indicate whether it appears when starting or after heating. Do not intervene in gas, electrodes, or combustion adjustments.
CodeF.68
Error: unstable flame (analog input)
ecoTEC pure VMW 236/7-2 and 286/7-2 H-ES.
How to interpret it. It is a warning from the combustion control or flame detection system. It requires checking its cause before choosing a spare part.
What can you observe? Indicate whether it appears when starting or after heating. Do not intervene in gas, electrodes, or combustion adjustments.
CodeF.70
Invalid product code (DSN)
ecoTEC pure VMW 236/7-2 and 286/7-2 H-ES.
How to interpret it. The warning relates to the control, its communications, or its configuration. It is not sufficient to confirm a faulty PCB.
What can you observe? Indicate if it appeared after a power cut, an intervention, or a change of control. Do not modify installer parameters.
CodeF.71
Fault: supply/return temperature sensor
ecoTEC pure VMW 236/7-2 and 286/7-2 H-ES.
How to interpret it. The warning identifies a signal or measurement that needs to be checked; it does not, by itself, indicate that the sensor needs to be replaced.
What can you observe? Keep a photo of the code and any indicated temperature or pressure. Do not disconnect sensors or bridge connections.
CodeF.72
Error: deviation of the water pressure sensor/return temperature sensor
ecoTEC pure VMW 236/7-2 and 286/7-2 H-ES.
How to interpret it. The warning identifies a signal or measurement that needs to be checked; it does not, by itself, indicate that the sensor needs to be replaced.
What can you observe? Keep a photo of the code and any indicated temperature or pressure. Do not disconnect sensors or bridge connections.
CodeF.73
Error: water pressure sensor not connected or short-circuited
ecoTEC pure VMW 236/7-2 and 286/7-2 H-ES.
How to interpret it. The warning identifies a signal or measurement that needs to be checked; it does not, by itself, indicate that the sensor needs to be replaced.
What can you observe? Keep a photo of the code and any indicated temperature or pressure. Do not disconnect sensors or bridge connections.
CodeF.74
Error: electrical problem with the water pressure sensor
ecoTEC pure VMW 236/7-2 and 286/7-2 H-ES.
How to interpret it. The warning identifies a signal or measurement that needs to be checked; it does not, by itself, indicate that the sensor needs to be replaced.
What can you observe? Keep a photo of the code and any indicated temperature or pressure. Do not disconnect sensors or bridge connections.
CodeF.77
Fault: condensate or smoke
ecoTEC pure VMW 236/7-2 and 286/7-2 H-ES.
How to interpret it. This meaning corresponds to the indicated variant and its manual. The code guides the diagnosis, but does not confirm a spare part.
What can you observe? Please provide a photo of the warning, the equipment reference, and when it appears: during startup, in heating mode, or with hot water.
CodeF.83
Fault: Dry fire
ecoTEC pure VMW 236/7-2 and 286/7-2 H-ES.
How to interpret it. This meaning corresponds to the indicated variant and its manual. The code guides the diagnosis, but does not confirm a spare part.
What can you observe? Please provide a photo of the warning, the equipment reference, and when it appears: during startup, in heating mode, or with hot water.
CodeF.84
Fault: supply/return temperature sensor
ecoTEC pure VMW 236/7-2 and 286/7-2 H-ES.
How to interpret it. The warning identifies a signal or measurement that needs to be checked; it does not, by itself, indicate that the sensor needs to be replaced.
What can you observe? Keep a photo of the code and any indicated temperature or pressure. Do not disconnect sensors or bridge connections.
CodeF.85
Fault: temperature sensor
ecoTEC pure VMW 236/7-2 and 286/7-2 H-ES.
How to interpret it. The warning identifies a signal or measurement that needs to be checked; it does not, by itself, indicate that the sensor needs to be replaced.
What can you observe? Keep a photo of the code and any indicated temperature or pressure. Do not disconnect sensors or bridge connections.
CodeF.87
Fault: Ignition transformer cable
ecoTEC pure VMW 236/7-2 and 286/7-2 H-ES.
How to interpret it. It is a warning from the combustion control or flame detection system. It requires checking its cause before choosing a spare part.
What can you observe? Indicate whether it appears when starting or after heating. Do not intervene in gas, electrodes, or combustion adjustments.
CodeF.88
Fault: gas valve assembly
ecoTEC pure VMW 236/7-2 and 286/7-2 H-ES.
How to interpret it. It is a warning from the combustion control or flame detection system. It requires checking its cause before choosing a spare part.
What can you observe? Indicate whether it appears when starting or after heating. Do not intervene in gas, electrodes, or combustion adjustments.
CodeF.89
Error: pump
ecoTEC pure VMW 236/7-2 and 286/7-2 H-ES.
How to interpret it. The warning must be interpreted along with the circuit status and the equipment readings; it does not indicate a specific part by itself.
What can you observe? Note the visible pressure and the affected service. The internal circuit check is the responsibility of the professional.
CodeF.97
Error: main PCB self-check fault
ecoTEC pure VMW 236/7-2 and 286/7-2 H-ES.
How to interpret it. The warning relates to the control, its communications, or its configuration. It is not sufficient to confirm a faulty PCB.
What can you observe? Indicate if it appeared after a power cut, an intervention, or a change of control. Do not modify installer parameters.
turboTEC plus / pro
VM/VMW variants of manual 0020029213_01 · Manual 0020029213_01.
The table in the manual may include variants and accessories that your unit does not come with. Please confirm its full designation.
29 documented entries
CodeF.0
Return temperature sensor (NTC).
turboTEC plus / pro: VM/VMW variants of manual 0020029213_01.
How to interpret it. The warning identifies a signal or measurement that needs to be checked; it does not, by itself, indicate that the sensor needs to be replaced.
What can you observe? Keep a photo of the code and any indicated temperature or pressure. Do not disconnect sensors or bridge connections.
CodeF.1
Return temperature sensor (NTC).
turboTEC plus / pro: VM/VMW variants of manual 0020029213_01.
How to interpret it. The warning identifies a signal or measurement that needs to be checked; it does not, by itself, indicate that the sensor needs to be replaced.
What can you observe? Keep a photo of the code and any indicated temperature or pressure. Do not disconnect sensors or bridge connections.
CodeF.5
Interruption of the external exhaust gas sensor.
turboTEC plus / pro: VM/VMW variants of manual 0020029213_01.
How to interpret it. Configuration exception: the table links this warning to an incorrect DSN atmoTEC variant number. It does not imply that a turboTEC uses that gas sensor.
What can you observe? Provide the full designation and code to the technician. Do not change the variant configuration.
CodeF.6
Interruption of the internal exhaust gas sensor.
turboTEC plus / pro: VM/VMW variants of manual 0020029213_01.
How to interpret it. Configuration exception: the table links this warning to an incorrect DSN atmoTEC variant number. It does not imply that a turboTEC uses that gas sensor.
What can you observe? Provide the full designation and code to the technician. Do not change the variant configuration.
CodeF.10
Short circuit in the supply temperature sensor.
turboTEC plus / pro: VM/VMW variants of manual 0020029213_01.
How to interpret it. The warning identifies a signal or measurement that needs to be checked; it does not, by itself, indicate that the sensor needs to be replaced.
What can you observe? Keep a photo of the code and any indicated temperature or pressure. Do not disconnect sensors or bridge connections.
CodeF.11
Short circuit in the return temperature sensor.
turboTEC plus / pro: VM/VMW variants of manual 0020029213_01.
How to interpret it. The warning identifies a signal or measurement that needs to be checked; it does not, by itself, indicate that the sensor needs to be replaced.
What can you observe? Keep a photo of the code and any indicated temperature or pressure. Do not disconnect sensors or bridge connections.
CodeF.20
Response from the safety temperature limiter.
turboTEC plus / pro: VM/VMW variants of manual 0020029213_01.
How to interpret it. The control has detected a temperature condition. The code and the moment it appears must be evaluated together.
What can you observe? Note the displayed temperature and whether the heating or hot water was functioning. Do not disable protections.
CodeF.22
Lack of water or service/dry combustion.
turboTEC plus / pro: VM/VMW variants of manual 0020029213_01.
How to interpret it. The warning refers to the water in the circuit; it does not independently identify a leak or a faulty pump.
What can you observe? Note the visible pressure and whether it has changed since the last use. Indicate if you see water under the equipment, without opening it or filling it by trial.
CodeF.23
Lack of water; the difference between the supply and return sensors is too high.
turboTEC plus / pro: VM/VMW variants of manual 0020029213_01.
How to interpret it. The boiler detects an excessive difference between supply and return. It is not the same warning as a rapid temperature rise.
What can you observe? Indicate whether it occurs when requesting heating or hot water and if the radiators were heating. Do not manipulate the pump or the sensors.
CodeF.24
Lack of water; temperature rise too fast.
turboTEC plus / pro: VM/VMW variants of manual 0020029213_01.
How to interpret it. The relevant factor is the speed at which the temperature increases, not just its final value.
What can you observe? Note how long it takes to appear from the demand and what temperature the display shows, if accessible.
CodeF.26
Current of the gas valve of the gradual speed motor not plausible.
turboTEC plus / pro: VM/VMW variants of manual 0020029213_01.
How to interpret it. It is a warning from the combustion control or flame detection system. It requires checking its cause before choosing a spare part.
What can you observe? Indicate whether it appears when starting or after heating. Do not intervene in gas, electrodes, or combustion adjustments.
CodeF.27
Flame ionization signal detected even though the gas valve is disconnected (external light).
turboTEC plus / pro: VM/VMW variants of manual 0020029213_01.
How to interpret it. It is a warning from the combustion control or flame detection system. It requires checking its cause before choosing a spare part.
What can you observe? Indicate whether it appears when starting or after heating. Do not intervene in gas, electrodes, or combustion adjustments.
CodeF.28
The appliance does not start: failed ignition attempts during startup.
turboTEC plus / pro: VM/VMW variants of manual 0020029213_01.
How to interpret it. The ignition does not establish the flame when starting. It is different from a fault occurring during an already established flame.
What can you observe? Indicate whether it occurs when opening a hot tap, when requesting heating, or in both cases. Do not force the start with repeated resets.
CodeF.29
The flame goes out during operation and subsequent ignition attempts fail.
turboTEC plus / pro: VM/VMW variants of manual 0020029213_01.
How to interpret it. The flame goes out during operation. The moment of the cut helps to differentiate it from an initial ignition fault.
What can you observe? Note whether the equipment had heated before stopping and if it happens consistently or intermittently. Do not check gas components.
CodeF.33
The pressure gauge does not turn on.
turboTEC plus / pro: VM/VMW variants of manual 0020029213_01.
How to interpret it. This meaning corresponds to the indicated variant and its manual. The code guides the diagnosis, but does not confirm a spare part.
What can you observe? Please provide a photo of the warning, the equipment reference, and when it appears: during startup, in heating mode, or with hot water.
CodeF.49
Low voltage identification in eBUS.
turboTEC plus / pro: VM/VMW variants of manual 0020029213_01.
How to interpret it. The warning relates to the control, its communications, or its configuration. It is not sufficient to confirm a faulty PCB.
What can you observe? Indicate if it appeared after a power cut, an intervention, or a change of control. Do not modify installer parameters.
CodeF.61
Fault in the gas valve regulation.
turboTEC plus / pro: VM/VMW variants of manual 0020029213_01.
How to interpret it. It is a warning from the combustion control or flame detection system. It requires checking its cause before choosing a spare part.
What can you observe? Indicate whether it appears when starting or after heating. Do not intervene in gas, electrodes, or combustion adjustments.
CodeF.62
Incorrect gas valve disconnection delay.
turboTEC plus / pro: VM/VMW variants of manual 0020029213_01.
How to interpret it. It is a warning from the combustion control or flame detection system. It requires checking its cause before choosing a spare part.
What can you observe? Indicate whether it appears when starting or after heating. Do not intervene in gas, electrodes, or combustion adjustments.
CodeF.63
Faulty EEPROM.
turboTEC plus / pro: VM/VMW variants of manual 0020029213_01.
How to interpret it. The warning relates to the control, its communications, or its configuration. It is not sufficient to confirm a faulty PCB.
What can you observe? Indicate if it appeared after a power cut, an intervention, or a change of control. Do not modify installer parameters.
CodeF.64
Fault in electronic system/sensors.
turboTEC plus / pro: VM/VMW variants of manual 0020029213_01.
How to interpret it. The warning identifies a signal or measurement that needs to be checked; it does not, by itself, indicate that the sensor needs to be replaced.
What can you observe? Keep a photo of the code and any indicated temperature or pressure. Do not disconnect sensors or bridge connections.
CodeF.65
Electronic system temperature too high.
turboTEC plus / pro: VM/VMW variants of manual 0020029213_01.
How to interpret it. The control has detected a temperature condition. The code and the moment it appears must be evaluated together.
What can you observe? Note the displayed temperature and whether the heating or hot water was functioning. Do not disable protections.
CodeF.67
Flame controller input signal out of range (0 or 5 V).
turboTEC plus / pro: VM/VMW variants of manual 0020029213_01.
How to interpret it. It is a warning from the combustion control or flame detection system. It requires checking its cause before choosing a spare part.
What can you observe? Indicate whether it appears when starting or after heating. Do not intervene in gas, electrodes, or combustion adjustments.
CodeF.70
There is no valid device variant for the display and/or the electronic system.
turboTEC plus / pro: VM/VMW variants of manual 0020029213_01.
How to interpret it. The warning relates to the control, its communications, or its configuration. It is not sufficient to confirm a faulty PCB.
What can you observe? Indicate if it appeared after a power cut, an intervention, or a change of control. Do not modify installer parameters.
CodeF.71
The supply sensor communicates a constant value.
turboTEC plus / pro: VM/VMW variants of manual 0020029213_01.
How to interpret it. The warning identifies a signal or measurement that needs to be checked; it does not, by itself, indicate that the sensor needs to be replaced.
What can you observe? Keep a photo of the code and any indicated temperature or pressure. Do not disconnect sensors or bridge connections.
CodeF.72
Fault in supply and/or return sensor.
turboTEC plus / pro: VM/VMW variants of manual 0020029213_01.
How to interpret it. The warning identifies a signal or measurement that needs to be checked; it does not, by itself, indicate that the sensor needs to be replaced.
What can you observe? Keep a photo of the code and any indicated temperature or pressure. Do not disconnect sensors or bridge connections.
CodeF.73
Fault in the pressure sensor.
turboTEC plus / pro: VM/VMW variants of manual 0020029213_01.
How to interpret it. The warning identifies a signal or measurement that needs to be checked; it does not, by itself, indicate that the sensor needs to be replaced.
What can you observe? Keep a photo of the code and any indicated temperature or pressure. Do not disconnect sensors or bridge connections.
CodeF.74
Fault in the water pressure sensor.
turboTEC plus / pro: VM/VMW variants of manual 0020029213_01.
How to interpret it. The warning identifies a signal or measurement that needs to be checked; it does not, by itself, indicate that the sensor needs to be replaced.
What can you observe? Keep a photo of the code and any indicated temperature or pressure. Do not disconnect sensors or bridge connections.
CodeF.75
Water pressure sensor and/or faulty pump; when the pump was turned on, no pressure drop was detected.
turboTEC plus / pro: VM/VMW variants of manual 0020029213_01.
How to interpret it. The control does not detect the expected pressure change when starting the pump; the code does not confirm which component is causing it.
What can you observe? Note the indicated pressure before the warning and if it appears when starting the demand. The check of the pump, sensor, and circuit is the technician's responsibility.
CodeF.77
Faulty condensate pump (only possible in connection with accessories).
turboTEC plus / pro: VM/VMW variants of manual 0020029213_01.
How to interpret it. The table links this notice to a condensate pump as an accessory. It should not be attributed to all turboTEC.
What can you observe? Indicate if there is an external condensate pump installed, without disassembling or disconnecting it.
We cannot find that code for selection. Check the digits or change the model; refer to its manual if the warning persists.
What to do with the warning
Note the complete code, the pressure displayed by the unit, and whether it affects heating, domestic hot water, or both. Keep a photo of the screen and the reference of the appliance. Do not open the boiler or intervene in gas, electricity, or combustion. Only perform the external checks allowed by the user manual; if the fault persists, request professional diagnosis.
Request a review of the boiler. · Vaillant spare parts and equipment at Uniclima
turboTEC plus: how to distinguish the alerts
In the Vaillant turboTEC plus covered by manual 0020029213_01, fault codes F.22, F.23, and F.24 indicate a lack of water or insufficient circulation detected through pressure/temperature; F.28 indicates that the unit failed to ignite upon starting, and F.29 indicates that the flame was lost during operation and subsequent attempts failed. These are indications to guide the diagnosis: none of them alone identifies a faulty spare part.
Check the variant before using the table.
The manual includes several turboTEC plus and pro models, with codes and details that depend on the variant. Confirm in the accessible identification that your unit is turboTEC plus VMW and note the full designation. Do not use this table for ecoTEC or for any other generation just because it also shows F codes.
F.22, F.23 and F.24: difference between the alerts
- F.22: the manual relates it to lack of water or dry operation; among the possible causes, it mentions low water, a switch/sensor, wiring, or pump issues.
- F.23: indicates an excessive difference between the supply and return temperatures; the manual addresses circulation problems, among other causes.
- F.24: indicates a temperature rise that is too rapid; air may be entering the unit, there may be low pressure, or a pump with insufficient performance may be involved.
The causes are listed in the manufacturer's diagnostic table for specialized personnel. From the outside, you can note the code, the pressure displayed by the equipment, the heating status, and whether the radiators are heating normally. Do not assume that the pump is blocked or manipulate the circuit based on the code.
F.28 and F.29: ignition failure or flame loss
The manual distinguishes between failed ignition at startup (F.28) and flame loss with subsequent failed attempts (F.29). It includes several possible causes related to supply, ignition, flame detection, and control. Do not check internal components or repeat resets to force the start. If the code persists, request a review and inform whether it affects heating, domestic hot water, or both.
What information to provide?
Send a legible photo of the code, the complete variant, when it appears, and any recent changes in pressure or service. The manual also documents sensor and electronic codes: those alerts require professional diagnosis; they do not equate to a confirmation of spare part.
Compare only with another guide that corresponds to your model in the fault index by brand and modelFor a review, describe the fault of the boilerIt is not recommended to purchase a pump, sensor, gas valve, or PCB until the fault is confirmed.
Primary source: Vaillant, installation and maintenance instructions turboTEC plus/turboTEC pro, ref. 0020029213_01, pp. 39–40 (pages 41–42 of the PDF), table 9.4. The document distinguishes the variant, the code, and the possible causes; the internal tasks described for the installer are not presented here as user checks.
Vaillant PDF manuals by model
Download the document that matches your equipment's reference. Each file retains its edition and scope of application.
Vaillant turboTEC plus / pro
Document editing
Check the VM/VMW reference of your equipment in the model list of the document. Manual intended for the specialized installer.
Vaillant ecoTEC exclusive CF/1-7
Document editing
VMW 30/36/43 CF/1-7. Manufacturer's technical document; check that it matches your appliance.
Vaillant ecoTEC plus CS/1-5
Document editing
VMW 23/26/32/36 CS/1-5. Manufacturer's technical document; check that it matches your appliance.
Vaillant ecoTEC pro
Document editing
VMW 236/5-3 and 286/5-3 H-ES. Manufacturer's technical document; check that it matches your device.
Vaillant ecoTEC pure
Document editing
VMW 236/7-2 and 286/7-2 H-ES. Manufacturer's technical document; check that it matches your unit.