BoilerFaultCodesYour boiler has failed to light or maintain a flame, meaning your heating and hot water will not work until the system is reset or repaired.
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 occur when the boiler tries to light but cannot confirm that a stable flame has been established. It is most commonly caused by a worn-out ignition lead that can no longer create a spark, or debris buildup on the sensor that detects the heat of the flame. In some cases, it may also indicate that the gas supply is restricted or the internal valve is failing to open.
This fault often appears during the first cold snap of winter when the boiler is under increased strain after being inactive over the summer months.
DIY fix possible
Check if your gas supply is active (e.g., check other gas appliances like a hob)Locate the selector switch on the front of the boilerTurn the switch to the 'R' (Reset) position for 5 seconds, then back to the on position
Find a Gas Safe engineer
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A boiler cover plan would cover faults like 1 — no call-out fees, no surprises.
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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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