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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

 

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