Short answer
The boiler Cointra Superlative Condens 25 C displays its faults with fault codes type A.. and F.. on the display. It is manufactured on the platform Ferroli Bluehelix, so their codes match those of that range. Here is the complete list: what each code means, why it appears and how to solve it, as well as what you can check yourself and when to call a technician.
Error code table for the Superlative Condens 25 C
Quick summary of all fault codes. Below you have the details of each one with its cause and solution.
| Code | Meaning |
|---|---|
| A01 | The burner does not ignite |
| A02 | Flame signal detected with the burner off |
| A03 | Overtemperature protection operation |
| A04 | Flue duct protection activated |
| A05 | Fan protection activated |
| A06 | No flame after the ignition phase (several attempts) |
| A23 | Anomaly in the parameters of the PCB |
| A24 | Anomaly in the parameters of the PCB |
| A26 | Anomaly in the parameters of the PCB |
| A41 | Incorrect position of the sensors |
| A42 | Heating sensor anomaly |
| A61 | Anomaly in the ABM03 control board |
| A62 | No communication between the control board and the gas valve |
| A63 | Anomaly in the ABM03 control board |
| A65 | Anomaly in the ABM03 control board |
| F07 | Excessively high flue gas temperature |
| F10 | Anomaly in flow sensor 1 |
| F11 | Anomaly in the domestic hot water (DHW) sensor |
| F12 | Anomaly in the domestic hot water sensor |
| F13 | Anomaly in the heat exchanger sensor |
| F14 | Anomaly in flow sensor 2 |
| F15 | Fan anomaly |
| F20 | Anomaly in the parameters of the PCB |
| F21 | Anomaly in the parameters of the PCB |
| F34 | Mains voltage too low |
| F35 | Abnormal electrical grid frequency |
| F37 | Incorrect water pressure in the installation |
| F39 | Anomaly in the external sensor |
| F40 | Anomaly in the parameters of the PCB |
| F42 | Heat exchanger protection activated |
| F43 | Heat exchanger protection activated |
| F47 | Anomaly in the parameters of the PCB |
| F52 | Heating sensor anomaly |
| F64 | Anomaly in the ABM03 control board |
| F66 | Anomaly in the ABM03 control board |
What can you check yourself?
Some alerts can be resolved with simple and safe checks: replenishing the water pressure, bleeding the air from the radiators, checking that the gas valve is open, or resetting the boiler after a temporary lockout. If the code reappears after doing this, there is an underlying cause that should be reviewed by a qualified technician. Do not manipulate internal gas components nor electronics.
How to replenish the pressure step by step
- Locate the filling valve under the boiler.
- Open it slowly while observing the pressure gauge.
- Close the valve upon arrival at between 1 and 1.5 bar in cold.
- Bleed the radiators starting with the furthest one and check the pressure again.
- Reset the boiler; if the pressure warning disappears, the problem was resolved.
All fault codes and their solution
A01 — The burner does not ignite
Why does it appear: Lack of gas supply, defective ignition or ionisation electrode, faulty gas valve, insufficient ignition power, blocked siphon or air/flue ducts.
What to do: Check that the gas supply is active. Verify the condition and position of the electrode and its wiring. If the problem persists, it should be inspected by a qualified technician.
Affected component: Gas valve
A02 — Flame signal detected with the burner off
Why does it appear: Dirty or deteriorated ionisation electrode, faulty wiring, or fault in the PCB.
What to do: Inspect the ionisation electrode and its wiring. If the anomaly persists, a technician should review the control board.
Affected component: Ignition/Ionisation Electrode
A03 — Activation of overtemperature protection
Why does it appear: Damaged heating sensor, lack of water circulation, or presence of air in the circuit.
What to do: Check that the circulation pump is working and bleed the air from the circuit. If it repeats, a technician should inspect it.
Affected component: Circulation pump
A04 — Flue protection activated
Why does it appear: The fault F07 (high flue gas temperature) has occurred several times; it may indicate dirt or deterioration of the heat exchanger.
What to do: Resolve the cause of F07. The inspection and cleaning of the heat exchanger must be carried out by a qualified technician.
Affected component: Heat exchanger
A05 — Fan protection activated
Why does it appear: The fault F15 has persisted continuously; power supply or fan signal issue.
What to do: Resolve the cause of F15. The fan and its wiring should be checked by a technician.
Related spare part: Fan / extractor
A06 — No flame after the ignition phase (several attempts)
Why does it appear: Defective ionisation electrode, unstable flame, miscalibrated gas valve, obstructed flue pipes or condensate trap.
What to do: Check the electrode and the burner, and inspect the ducts and the siphon. Requires a qualified technician.
Affected component: Ignition/Ionisation Electrode
A23 — Anomaly in the parameters of the PCB
Why does it appear: Incorrect configuration parameters of the card.
What to do: Reconfiguration of the parameters by a qualified technician.
Related spare part: PCB (control board)
A24 — Anomaly in the parameters of the PCB
Why does it appear: Incorrect configuration parameters of the card.
What to do: Reconfiguration of the parameters by a qualified technician.
Related spare part: PCB (control board)
A26 — Anomaly in the parameters of the PCB
Why does it appear: Incorrect configuration parameters of the card.
What to do: Reconfiguration of the parameters by a qualified technician.
Related spare part: PCB (control board)
A41 — Incorrect sensor positioning
Why does it appear: The flow sensor or the domestic hot water (DHW) sensor has detached from its pipe.
What to do: Reposition and securely fix the sensors. There's no need to replace them if they are in good condition; this should be confirmed by a technician.
Affected component: Temperature sensor
A42 — Heating sensor anomaly
Why does it appear: Heating sensor fault.
What to do: Replacement of the heating sensor by a technician.
Affected component: Temperature sensor
A61 — Anomaly in the ABM03 control board
Why does it appear: Internal fault in the control board.
What to do: Check the appliance's grounding. If the issue persists, the control board should be replaced by a technician.
Related spare part: PCB (control board)
A62 — No communication between the control board and the gas valve
Why does it appear: Control board disconnected or gas valve fault.
What to do: Reconnection of the control board to the gas valve by a technician; replacement of the valve if it is faulty.
Related spare part: PCB (control board)
A63 — Anomaly in the ABM03 control board
Why does it appear: Internal fault in the control board.
What to do: Check the grounding. If it persists, replacement of the control board by a technician.
Related spare part: PCB (control board)
A65 — Anomaly in the ABM03 control board
Why does it appear: Internal fault in the control board.
What to do: Check the grounding. If it persists, replacement of the control board by a technician.
Related spare part: PCB (control board)
F07 — Flue gas temperature excessively high
Why does it appear: The flue sensor detects an abnormal temperature, possible dirt or deterioration of the heat exchanger.
What to do: The inspection and cleaning of the heat exchanger should be carried out by a qualified technician.
Affected component: Heat exchanger
F10 — Anomaly in flow sensor 1
Why does it appear: Faulty sensor, wiring short-circuited or interrupted.
What to do: Check the sensor wiring; replacement of the sensor by a technician if it is damaged.
Affected component: Temperature sensor
F11 — Domestic hot water sensor fault
Why does it appear: Defective sensor or interrupted wiring.
What to do: Check the wiring; replacement of the sensor by a technician if it is damaged.
Affected component: Temperature sensor
F12 — Domestic hot water sensor anomaly
Why does it appear: Defective sensor or wiring problem.
What to do: Check the wiring; replacement of the sensor by a technician if necessary.
Affected component: Temperature sensor
F13 — Anomaly in the heat exchanger sensor
Why does it appear: Sensor fault or wiring interrupted.
What to do: Check the connections; replacement of the sensor by a technician if it is damaged.
Affected component: Temperature sensor
F14 — Anomaly in flow sensor 2
Why does it appear: Faulty sensor or defective wiring.
What to do: Check the wiring; replacement of the sensor by a technician if it is damaged.
Affected component: Temperature sensor
F15 — Fan anomaly
Why does it appear: Lack of voltage in the fan, interrupted revolution signal, or faulty fan.
What to do: The wiring and fan inspection should be carried out by a technician.
Related spare part: Fan / extractor
F20 — Anomaly in the parameters of the PCB
Why does it appear: Incorrect configuration parameters.
What to do: Reconfiguration by a qualified technician.
Related spare part: PCB (control board)
F21 — Anomaly in the parameters of the PCB
Why does it appear: Incorrect configuration parameters.
What to do: Reconfiguration by a qualified technician.
Related spare part: PCB (control board)
F34 — Mains voltage too low
Why does it appear: Voltage drop or issue in the electrical installation.
What to do: Check the electrical installation. If the mains voltage is persistently low, consult with the electricity supplier.
Affected component: Electrical installation
F35 — Abnormal mains frequency
Why does it appear: Problem in the electrical installation.
What to do: Check the electrical installation.
Affected component: Electrical installation
F37 — Incorrect installation water pressure
Why does it appear: Pressure too low (below 0.5 bar) or water pressure switch disconnected or faulty.
What to do: Fill the circuit up to 1-1.5 bar. If the pressure is correct and the error persists, the pressure switch should be checked by a technician.
F39 — External sensor anomaly
Why does it appear: External sensor faulty, short-circuited or disconnected with the adaptive temperature function activated.
What to do: Check the wiring of the external sensor. If you do not have an external sensor, a technician can disable the adaptive temperature function.
Affected component: Temperature sensor
F40 — Anomaly in the parameters of the PCB
Why does it appear: Incorrect configuration parameters.
What to do: Reconfiguration by a qualified technician.
Related spare part: PCB (control board)
F42 — Heat exchanger protection activated
Why does it appear: Lack of water circulation or presence of air in the circuit.
What to do: Check the circulation pump and bleed the air from the circuit.
Affected component: Circulation pump
F43 — Heat exchanger protection activated
Why does it appear: Lack of water circulation or presence of air in the circuit.
What to do: Check the circulation pump and bleed the air from the circuit.
Affected component: Circulation pump
F47 — Anomaly in the parameters of the PCB
Why does it appear: Incorrect configuration parameters.
What to do: Reconfiguration by a qualified technician.
Related spare part: PCB (control board)
F52 — Heating sensor anomaly
Why does it appear: Defective sensor (alternative code to A42).
What to do: Replacement of the sensor by a technician.
Affected component: Temperature sensor
F64 — Anomaly in the ABM03 control board
Why does it appear: Internal fault in the control board.
What to do: Check the grounding. If it persists, replacement of the control board by a technician.
Related spare part: PCB (control board)
F66 — Anomaly in the ABM03 control board
Why does it appear: Internal fault in the control board.
What to do: Check the grounding. If it persists, replacement of the control board by a technician.
Related spare part: PCB (control board)
When to call a technician
Fault codes related to sensors, electronics, gas valve, fan, or flue gas evacuation require a qualified technician with the appropriate equipment. If the same fault code reappears after a reset, or if the pressure drops repeatedly, a professional inspection is advisable. In Uniclima do you find spare parts for this boiler.
Frequently Asked Questions
Most lockouts can be cleared with the reset button on the panel. If the fault code reappears immediately, there is an underlying cause that should be diagnosed before persisting.
Between 1 and 1.5 bar when cold. Below 0.5 bar, the pressure fault F37 appears and the boiler locks out for safety.
The Cointra Superlative Condens is manufactured on the Ferroli Bluehelix platform, so it shares the electronics and diagnostic codes (A.. and F..).
The pressure ones (refill water), the circulation or air ones (bleed radiators), and check the gas supply. The sensors, fan, control board, and gas valve require a qualified technician.