BoilerFaultCodesYour boiler has failed to light a flame, meaning it cannot heat your water or radiators.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Flame failure
What causes this fault?
This fault occurs when the boiler's control system attempts to light the burner but fails to detect a stable flame. The most common reasons include a worn-out ignition spark, a blocked gas supply, or a faulty sensor that cannot confirm the fire is safely lit. Without this confirmation, the boiler must shut down for safety purposes.
This fault can be more common during sudden cold snaps, as sub-zero temperatures can cause external gas meters or pipes to freeze, restricting the gas pressure needed for ignition.
DIY fix possible
Check that your gas pre-payment meter has credit.Check that other gas appliances, like a hob, are working correctly.Press the reset button or turn the control knob to 'Reset' for 2 seconds.
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
A boiler cover plan would cover faults like Fault led (B) illuminated (Flame failure) — no call-out fees, no surprises.
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Ideal Europa is discontinued — time for a new one?
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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