BoilerFaultCodesYour boiler is attempting to light but cannot maintain a flame, meaning it has safely shut down to prevent issues.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Flame loss after 6 successive ignitions – gas supply line valve being open.
What causes this fault?
This fault occurs when the boiler successfully lights but the internal sensors fail to detect a steady flame, causing the system to shut down for safety. The most common reasons are a buildup of carbon on the sensing probes, a blockage in the flue, or an unstable gas supply that prevents the burner from staying lit.
This fault is more common during the first cold snap of winter, as increased demand can highlight underlying issues with the gas valve or moisture buildup in the sensing electrodes.
DIY fix possible
Check that your gas emergency control valve is in the 'on' positionIf you have a pre-payment meter, ensure you have sufficient creditCheck if other gas appliances in your home, like a hob, are working correctlyPress and hold the 'R' (Reset) button for 3 seconds
Find a Gas Safe engineer
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Gas Safe Register →Protect yourself from future repair bills
A boiler cover plan would cover faults like rE41 — no call-out fees, no surprises.
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Could it be time for a new boiler?
If repair costs are adding up, a new energy-efficient boiler could be the smarter long-term choice.
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