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Alpha Boiler Fault Codes and Errors
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As much as any boiler can randomly start flashing lights and displaying error codes, the chances of your boiler doing the same are pretty low unless you have a budget boiler such as an Alpha boiler. But, as luck would have it, Alpha boiler fault codes are easy to fix, and in most cases, you can handle it yourself without having to call in a certified heating engineer.
However, remember that tampering with your boiler can void your warranty. As such, you should always contact a certified heating engineer whenever your boiler has an issue that you can’t solve on your own.
Alpha E-Tec Regular Gas Boiler Error Codes
| Fault
Code |
Description/ possible cause | Fixes |
| 1 | Ignition failure due to a faulty detection electrode or gas supply issues | Ensure your gas supply is functioning well, then reset the boiler. If the error doesn’t clear, call a heating engineer |
| 2 | Excessive heating resulting in a lockout | Call a heating engineer |
| 3 | The flue thermostat is recording excessive temperatures | Turn off the boiler and allow it to cool |
| 4 | Faulty gas valve electrical connection | The gas valve may need replacing. Call a heating engineer |
| 5 | Faulty heating flow sensor | Call a heating engineer |
| 6 | Wiring issues | Call a heating engineer |
| 7 | The Chimney sweep function is activated | |
| 8 | There have been too many reset attempts | Leave the boiler for a few hours, then reset it |
| 12 | The cylinder sensor is faulty | |
| 16 | Faulty fan due to it lacking power, being damaged, or being out of balance | Call a heating engineer |
| 20 | Faulty flame detection electrode | |
| 23 | Faulty heating return sensor | |
| 24 | The control panel button is faulty | |
| 27 | The primary flow is too low | Repressurise your boiler system |
| 29 | Faulty flue sensor | Call a heating engineer |
| 31 | This is normally displayed on Alpha Climatic boilers when the PCB loses communication with external controls | Call a heating engineer |
| 37 | The power supply to the boiler is below 170 V | Check your mains power supply |
| 38 & 43 | The flame rectification feature has malfunctioned | Call a heating engineer |
| 44 | Boiler locked out for safety reasons | Call a heating engineer |
| 45 | There is a high temperature difference between sections of the boiler | Switch off the boiler and allow it to cool down |
| 46 | Usually due to an optional thermostat intervention | Reset the boiler |
| 47 | Low burner output | Call a heating engineer |
| 49 | Excessive temperatures prompting the return sensor high-temperature intervention feature to kick in | Turn off the boiler and allow it to cool |
| 51 | The climatic RF communication function is faulty | Call a heating engineer |
| 70 | Faulty return flow sensor | It may need replacement |
| 71 | The boiler is unable to detect any primary temperature increase | Call a heating engineer |
Alpha E-Tec & Evoke Combi Boiler Error Codes
| Fault
Code |
Description/ possible cause | Fixes |
| 60 | Pump issue due to it being stuck or having electrical issues | A slight tapping or knocking of the pump should release it if it is stuck. If, however, it does not work, contact a heating engineer |
| 61 | The exchanger protection feature has been activated due to the presence of air in the pump or poor water circulation in the system | Call a heating engineer |
| 70 | The return/ flow sensor is faulty due to it being broken or short-circuited | Call a heating engineer |
| 75 & 76 | Possible failure of the return or flow sensor, or both. | Call a heating engineer |
| SR | Service reminder. This means you need to service your boiler | Call a heating engineer to carry out the scheduled service and maintenance of the boiler |
Alpha E-Tec Plus Combi Boiler Error Codes
| Error
Code |
Description/ possible cause | Fix |
| 60 | Pump error due to it being stuck or having an electrical issue | Slightly tap on the pump and reset the boiler. If it were due to the pump being seized, the error code would disappear. If it, however, remains, then you should call a heating engineer |
| 61 | Heat exchanger protection activated due to presence of air in the pump or low water circulation | Contact a heating engineer |
| 70 | Faulty return or flow sensor due to a possible wiring issue | Call a heating engineer |
| 75 | Either the return sensor or flow sensor, or both have failed | Call a heating engineer |
| 76 | Either the return sensor, or the flow sensor, or both sensors have failed | Call a heating engineer |
| SR | Your boiler is reminding you that it needs to be serviced | Arrange to have a heating engineer service your boiler |
Alpha Protec Plus Boiler Error Codes
| Error
Code |
Description/ possible cause | Fixes |
| A01 | Ignition failure due to faulty detection electrode, low or no gas supply | Check your gas supply to ensure it is working fine. Next, reset the boiler, and hopefully, the code will disappear. If it doesn’t, call a heating engineer |
| 0A2 | Flame detection fault. The flame signal may be present despite the boiler being off. This is primarily due to a faulty flame detection electrode or an issue with the PCB | Call a heating engineer |
| 0A3 | Boiler lockout due to an overheating thermostat | Turn off the boiler, allow it to cool down, then rest it. |
| 0A5 | An issue with the fan speed. The fan may be moving too slowly due to it being blocked by debris. | Call a heating engineer |
| 0A7 | The flue temperature is too high | Turn off the boiler and allow it to cool off |
| 0A8 | The flame circuit is faulty | Call a heating engineer |
| 0A9 | The gas valve is faulty, probably due to an electrical issue | Call a heating engineer |
| 0A15 | The temperature value shown on the flow or return sensor is incorrect. | Call a heating engineer |
| 0A16 & 0A17 | The temperature reading on the flow sensor is incorrect as it took too long for the flow temperature rise to be recorded | Call a heating engineer |
| 0A18 | Flow and return sensor issues due to sudden temperature changes | Call a heating engineer |
| 0A21 | Faulty PCB | Call a heating engineer |
| 0A30 | Faulty flow sensor due to short-circuiting | Call a heating engineer |
| 0A31 & 0A44 | The flow sensor is reading a temperature value that is out of the normal range | Ensure the flow sensor is connected properly |
| 0A37 | The boiler shut down due to there being too little water in the system | Repressurise your boiler system |
| 0A43 | An issue with the return sensor. Usually caused by a short circuit | Call a heating engineer |
| 0A80 | There is an issue with the flow or return sensor | |
| 0E2 | Flame detection issue | Call a heating engineer |
| 0E13 | To many reset attempts. Usually, more than 5 attempts made within the last 15 minutes | Leave the boiler for some time, then try resetting it |
| 0E25 | Faulty PCB | Call a heating engineer |
| 0E34 | DHW sensor is reading a temperature value outside the normal range | |
| 0E33 | The power supply to the boiler is below 170V. | Check your mains power supply or call a heating engineer |
| 0E37 | Low system pressure | Repressurise the boiler system |
| 0E45 | The flue sensor might be short-circuited | Call a heating engineer |
| 0E46 | The flue sensor is out of range | |
| 0E81 | The flow or return sensor is showing an incorrect temperature reading | Contact a heating engineer |
| 0E98 | Either the flow or the return sensor is reading an incorrect temperature value | Contact a heating engineer |
| 0E99 | There is a cascade communication error | Contact a heating engineer |
| FE94 | PCB fault | Contact a heating engineer |
| FE95 | The external flow sensor is out of range or is short-circuited | Contact a heating engineer |
| FE96 | The external sensor is faulty | Contact a heating engineer |
| FE97 | The boiler PCB was wrongly configured after changing the main or the display PCB | Contact a heating engineer |