BoilerFaultCodesYour boiler is lighting but cannot detect that the flame has been lit, causing it to shut down shortly after for safety.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Burner extinguishes after 10 seconds (Flame failure).
What causes this fault?
This fault occurs when the boiler's internal sensors fail to confirm that a flame is present, even if you can see it lighting briefly. The most common reason is a worn-out sensing probe that has become covered in carbon soot or a faulty control board that is no longer 'listening' for the flame signal. For safety, the boiler shuts down immediately because it thinks it is leaking unburnt gas.
DIY fix possible
Check that your gas supply is turned on and other gas appliances are workingRotate the selector switch to the 'Reset' position for five seconds and then back to the heating/hot water iconEnsure the system pressure is between 1 and 1.5 bar on the pressure gauge
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
Gas Safe Register →Protect yourself from future repair bills
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Parts for discontinued models can be hard to find and expensive. A new A-rated boiler could save you money on both repairs and energy bills.
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