Boiler Fault Codes

Boiler fault codes are a series of alphanumeric characters that are displayed on the boiler's control panel or flashing on an LED display. They are used to indicate a problem with the boiler, such as a low water pressure, a flame failure, or a faulty sensor.

The specific fault codes will vary depending on the make and model of the boiler. However, there are some common fault codes that are found across all brands.

Vaillant Boiler Fault Codes

Here are the top 10 Vaillant boiler fault codes:

• E01: Low water pressure.
• E02: Flame loss.
• E03: Gas valve fault.
• E04: Overheating.
• E05: Flow sensor fault.
• E06: Return sensor fault.
• E10: Ignition failure.
• E19: Flue gas temperature fault.
• E20: Expansion vessel fault.
• E22: Primary heat exchanger fault.
• E27: Secondary heat exchanger fault.

Ideal Boiler Fault Codes

Here are the top 10 Ideal boiler fault codes:

• F1: Low water pressure.
• F2: Flame loss.
• F3: Fan fault.
• F4: Flow thermistor fault.
• F5: Return thermistor fault.
• F6: Outside sensor fault.
• L1: Flow temperature overheat or no water flow.
• L2: Flame loss.
• L5: 5 boiler resets in 15 minutes.
• L6: False flame lockout.

Worcester Boiler Fault Codes

Here are the top 10 Worcester boiler fault codes:

• E22: Low water pressure.
• E28: No gas.
• E29: Flame loss.
• E96: Faulty flue gas sensor.
• EA1: Faulty motorised valve.
• EA2: Faulty diverter valve.
• EB1: Faulty expansion vessel.
• EC1: Faulty pump.
• ED1: Faulty NTC sensor.
• EE1: Faulty PCB.
• EF1: Faulty heat exchanger.

Baxi Boiler Fault Codes

Here are the top 10 Baxi boiler fault codes:

• F1: Low water pressure.
• F2: Flame loss.
• F3: Fan fault.
• F4: Flow thermistor fault.
• F5: Return thermistor fault.
• F6: Expansion vessel fault.
• F7: Ignition failure.
• F8: Flue gas temperature fault.
• F9: Primary heat exchanger fault.
• F10: Secondary heat exchanger fault.

What to Do If You See a Boiler Fault Code

If you see a boiler fault code, the first thing you should do is check the boiler's instruction manual. The manual will usually provide a description of the fault code and instructions on how to troubleshoot the problem.

If you are unable to troubleshoot the problem yourself, you should call a qualified boiler engineer. Do not attempt to repair the boiler yourself, as this could be dangerous.

How to Prevent Boiler Faults

The best way to prevent boiler faults is to have your boiler serviced regularly by a qualified engineer. A service will identify and fix any potential problems before they cause a fault.

You can also help to prevent boiler faults by:

• Keeping the boiler clean and free of debris.
• Draining the boiler regularly.
• Replacing the boiler's filters as needed.
• Having the boiler's flue cleaned regularly.

By following these tips, you can help to keep your boiler running smoothly and prevent costly repairs.