Short answer
Cointra Superlative Supra faults
Identify the code and check the version of your boiler.
Models and version of the manual
24 °C, 28 °C and 34 °C. Superlative Supra C manual. It should not be confused with Superlative Plus or other generations of Cointra.
Consulted edition: 3541V210 · Rev. 00 · 04/2022 · manufacturer's manualThe control options, accessories, and versions may limit which notifications appear in each installation.
Locate the code on your screen.
These accesses lead to their entry in the table. They are not a classification of the most common faults: the manual does not provide incidence statistics.
- A01
The burner does not ignite
- F37
Incorrect water pressure in the system
- F05
Fan fault
- A64
Exceeded the maximum number of consecutive resets
What to do without opening the boiler
- Note what you see.
Complete code, message, and pressure displayed by the equipment. Indicate whether it occurs when opening hot water, requesting heating, or in both cases.
- Identify the device.
Take a photo of the screen and the identification accessible without disassembling anything. Brand, model, and version help avoid confusing tables from different ranges.
- Describe how it started.
Determine whether the fault is continuous or intermittent and if there was a supply interruption or a recent intervention. If it reappears after a reset allowed by the user manual, do not chain resets.
Do not open the casing or manipulate gas, wiring, combustion, or flue gas outlet. If you smell gas, avoid flames and switches, leave the area, and notify the distributor's emergency service from a safe location; in case of immediate danger, call 112.
Cointra Superlative Supra components Manufacturer's diagram
Documented codes table
The meaning of the warning is provided, not the repair operations reserved for qualified personnel. When the manufacturer groups several codes, the grouping is maintained; it is not interpreted as a range of numbers.
| Code | What does it indicate? |
|---|---|
| A01 | The burner does not ignite |
| A02 | Flame signal present with burner off |
| F05 | Fan fault |
| A06 | No flame after the ignition phase |
| F15 – A07 | High flue gas temperature |
| A08 | Overtemperature protection operation |
| A09 | Intervention protection heat exchanger |
| F09 | Overtemperature protection operation |
| F10 | Return sensor anomaly |
| F11 | Return sensor anomaly |
| F12 | Domestic hot water sensor anomaly |
| F13 | Flue sensor anomaly |
| A14 | Operation of the flue gas safety device |
| F34 | Supply voltage below 180 V |
| F35 | Incorrect power supply frequency |
| A23 / A24 / A26 / F20 / F21 / F40 / F47 / F51 | Anomaly of the pressure switch or water pressure measurement |
| F37 | Incorrect water pressure in the system |
| F39 | Outdoor sensor anomaly |
| F19 | Anomaly in the parameters of the control board |
| F50 – F53 | Limit thermostat anomaly with parameter b06 = 1 or 4 |
| A64 | Exceeded the maximum number of consecutive resets |
| F62 | Calibration request |
| A88 | Specific combustion control or gas valve faults |
| F65 – F98 | Specific combustion control faults |
| A65 – A97 | Specific combustion control faults |
| A98 | Too many SW errors or error appeared due to card replacement |
| A99 | Generic fault |
| F96 | Specific combustion faults: flame |
| A44 | Error due to multiple demands |
| A80 | False flame signal after the gas valve closure |
No matches found. Please check the code and the version of the equipment.
Is there a problem, but no fault code appears?
The absence of a warning does not rule out a fault. For a boiler that does not heat, does not deliver hot water, loses pressure, or operates intermittently, describe the symptom and the moment it occurs. Do not assume that the PCB, the pump, or a sensor is faulty without checking the equipment and the installation.
Request a review of the boiler. · Consult maintenance
Before requesting a repair
Does the code identify the spare part I need to buy?
No. A single warning can have multiple causes. The spare part reference requires identifying the appliance and confirming the fault; the code or a generic photograph is not sufficient.
Can it be reset again if the fault returns?
It is not advisable to chain resets. Follow only what is outlined for the user in your version's manual. A persistent or recurring lockout requires inspection.
When does it make sense to compare a new boiler?
When you have a diagnosis and a budget, compare repair, availability of the spare part, and replacement according to your installation. An isolated fault code does not justify changing the equipment.
Models of this guide in the catalog
- Cointra Superlative Supra 24C boiler
- Cointra Superlative Supra 28C boiler
- Cointra Superlative Supra 34C boiler
See new boilers · Consult installation or replacement
The technical sheet of each product provides information on its price and availability. Installation is quoted separately depending on the case.
Does the warning still appear on your Cointra boiler? Consult the Cointra boiler repair in Madrid or the spare parts Cointra by reference.
Documentation and other guides
Consult fault guides by brand and model. · Return to the blog