BoilerFaultCodesYour boiler is failing to stay lit or cannot detect its own flame, meaning it has shut down for safety and will not provide heating or hot water.
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
What causes this fault?
This fault occurs when the boiler's control system can no longer detect the flame required to heat your water, causing it to shut down for safety. The most common reasons include a buildup of carbon on the sensing probe, a skip in the gas supply, or an internal component failing to provide a consistent spark.
This fault can be more frequent during the first cold snap of winter, as internal components that have been idle over summer may struggle to operate correctly under increased demand.
DIY fix possible
Check if other gas appliances, like a hob, are working to ensure gas supply is activeIf it is freezing outside, check if the white plastic condensate pipe leading outdoors is frozen and thaw it with warm waterPress the 'Restart' button on the front control panel to reset the boiler
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 F2 — 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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