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Alpha boilers are known for their affordability, making them a popular choice for homeowners on a budget. However, due to their lower price point, they can experience more frequent breakdowns compared to premium models. Despite this, Alpha boilers maintain good customer ratings on most review platforms. This guide will help you understand common Alpha boiler fault codes and errors. In some cases, fixing the problem may not be cost-effective, and replacing the boiler might be a better option.
Legal Disclaimer: Professional Repair Only
It is important to note that attempting to fix your Alpha boiler on your own is both illegal and dangerous. Only a certified gas-safe engineer is authorized to work on gas appliances. This guide is meant to provide diagnostic information to help you communicate effectively with professionals and understand potential repair costs.
General Alpha Boiler Error/Fault Codes
Below is a table of the most common fault codes encountered in Alpha boilers, along with descriptions of the issues they represent.
Common Fault Codes and Descriptions
Fault Code | Fault | Description |
---|---|---|
1 | Ignition failure | Possible causes: issues with gas supply, pressure tubes, ignition electrode, flame sensor, gas valve, or PCB (Printed Circuit Board). |
2 | Overheat boiler lockout | Caused by a blocked heat exchanger, air in the system, pump issues, or thermostat problems. |
3 | High flue thermostat temperature | Indicates restricted primary flow, blocked heat exchanger, or flue issues. |
4 | Gas valve electrical fault | Related to faulty wiring connections or gas valve. |
5 | Heating flow sensor fault | Issues with flow sensor wiring or sensor failure. |
6 | Domestic hot water (DHW) sensor fault | Faulty wiring or sensor malfunction in the DHW system. |
8 | Maximum number of resets | Indicates repeated attempts to reset the boiler have failed. Review fault history for more information. |
10 | Low primary system pressure | Often due to leaks, faulty pressure relief valves, or insufficient expansion vessel pressure. |
12 | Cylinder sensor fault (FlowSmart only) | Indicates a fault in cylinder sensor wiring or sensor malfunction. |
15 | Internal wiring error | Involves issues with internal wiring connections to the PCB. |
16 | Fan fault | Related to faulty fan or its wiring connections. |
20 | Flame sensing fault | Fault in flame sensing electrode or related wiring. |
24 | Control panel button fault | Usually caused by jammed buttons on the control panel or PCB. |
25 | Overheat lockout | Caused by air in the heat exchanger or restricted flow within the system. |
27 | Insufficient primary flow | Possible blockages in the system, air in the heat exchanger, or pump issues. |
29 | Flue sensor fault | Indicates faulty flue sensor or related wiring issues. |
31 | Communication loss with external control | Involves issues with remote control or receiver connection. |
37 | Low supply voltage | Check the main power supply for irregularities. |
38, 43 | Loss of flame rectification | Potential gas supply issues or problems with flame sensing components. |
44 | Safety lockout | Caused by thermostat issues or hot tap requests being processed too quickly. |
46 | External sensor intervention | Often caused by external sensor damage or faulty connections. |
47 | Reduced burner output | Indicates airflow restrictions, heat exchanger issues, or pump faults. |
51 | Climatic RF communication fault | Related to communication issues between the boiler and the climatic control unit. |
Alpha E-Tec, E-Tec Plus, Evoke Combi Boiler Error/Fault Codes
Specific Error Codes for E-Tec Models
Fault Code | Fault | Description |
---|---|---|
60 | Pump error | Either the pump is stuck or there is an electrical fault. The pump may need freeing, or replacement may be required. |
61 | Air in pump | This is due to restricted central heating flow, improper system pressure, or valves being closed. |
70 | Return/flow sensor fault | Sensor wiring issues or faulty sensor resistance are likely causes. |
75/76 | Return/flow sensor failure | Both sensors may need to be inspected for potential failures. |
SR | Service reminder | Indicates that the service countdown has reached 0, but the boiler will continue working. |
Alpha E-TEC Regular Gas Boiler Error Codes
Common Fault Codes for Regular Gas Boilers
Fault Code | Fault | Description |
---|---|---|
1 | Ignition failure | Possible issues include problems with the gas supply, ignition electrode, or flame sensor. |
2 | Overheat boiler lockout | Caused by blocked heat exchangers, pump failures, or air trapped in the system. |
3 | High flue thermostat temperature | Indicates restricted flow or blocked heat exchangers. |
4 | Gas valve electrical connection fault | Fault in gas valve wiring or a faulty PCB. |
5 | Heating flow sensor fault | Issues with flow sensor wiring or malfunctioning sensor. |
6 | Internal wiring error | Indicates incorrect wiring configurations or internal PCB faults. |
7 | Chimney sweep function active | The chimney sweep function is active and needs to be disabled. |
16 | Fan fault | Indicates a problem with fan wiring or fan malfunction. |
27 | Insufficient primary flow | Blocked flow, air in the heat exchanger, or pump faults are common causes. |
44 | Safety lockout | Triggered by faulty thermostat requests or rapid on/off hot tap commands. |
Alpha Protec Plus System Error Codes
Fault Codes Specific to Protec Plus Systems
Fault Code | Fault | Description |
---|---|---|
OA1 | Ignition failure | Could be caused by gas supply issues or spark electrode faults. |
OA2 | Flame detection fault | Indicates issues with flame sensing electrode connections. |
OA3 | Overheat thermostat lock-out | May be caused by faulty flame sensing electrode connections or wiring. |
OA5 | Fan speed fault | Flue/ventilation problems or fan wiring issues. |
OA7 | High flue temperature fault | Could be caused by air in the heat exchanger or system restrictions. |
OA9 | Gas valve electrical error | Indicates a fault in valve connections or PCB. |
OA15 | Flow and return sensor anomaly | Detected abnormal temperature changes in the flow/return sensor. |
OA30 | Flow sensor short circuit | Indicates flow sensor wiring or connections need attention. |
OA31 | Flow sensor out of range | The flow sensor is detecting a temperature outside the normal range. |
0A37 | Insufficient system flow | The system flow is too low, likely due to restrictions or pump issues. |
OA43 | Return sensor short circuit | Caused by damaged return sensor wiring or connections. |
Alpha Flashing Light Error Codes
Understanding Flashing Lights on Alpha Boilers
Alpha boilers use a flashing light sequence to indicate specific problems. Below are common flashing light sequences and their meanings:
Light Sequence | Fault | Description |
---|---|---|
No lights on | Electricity fault | Indicates no power supply to the boiler. |
Red A or B | Burner has failed to ignite | Rotate selector switch to the reset position and try again. |
Yellow B or C | Burner is lit | No action required. |
Flashing yellow or green D | Electrical supply is on | No action required. |
Flashing red A or B | Temperature sensor fault | Contact a Gas Safe engineer. |
Red and yellow flashing | Pump fault or restricted flow | A Gas Safe engineer should check the pump and system. |
Final Thoughts: Boiler Maintenance and Warranty
Regular maintenance is crucial for the long-term reliability of your Alpha boiler. Make sure you schedule an annual service to maintain warranty conditions and prevent breakdowns. Should you encounter persistent issues, it may be worth considering a boiler replacement rather than repeated repairs.
By understanding these fault codes and troubleshooting steps, you’ll be better prepared to discuss the necessary repairs with a Gas Safe engineer. Always prioritize safety and never attempt repairs on your own.
FAQs
What does e01 mean on a Alpha boiler?
The Alpha boiler e01 error appears when there has been a problem with the ignition system. Generally, this means that there was no flame detected when your boiler tried to light the burner to then heat the water.
Why is my Alpha boiler flashing red?
Flashing red light (A indicator)
Seeing a flashing red light on the A indicator means that there’s an issue with the overheat thermostat. You might also see a 2, 25 or 0A3 error code. The overheat thermostat is a vital part of Alpha boilers as it monitors the temperature to prevent the unit from overheating
Different types of boilers:
Different boilers can be fitted differently. Combi Boiler, Conventional Boiler, Heating System Boiler, etc. are some of the main types and all have various installation specifications.