BoilerFaultCodesYour boiler has tried to start five times in a row but failed to keep the flame alight, causing it to shut down as a safety precaution.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: 5 restarts within 15 minutes
What causes this fault?
This fault occurs when the boiler's internal computer detects that the flame has gone out or failed to light properly five times in quick succession. It is usually caused by a problem with the gas supply reaching the burner or a worn-out ignition component that can no longer create a reliable spark. To prevent a build-up of unburnt gas, the boiler permanently shuts down until the underlying mechanical issue is fixed.
This fault can be more frequent during extreme cold snaps if a partially frozen condensate pipe causes the flame to 'choke' and go out repeatedly.
DIY fix possible
Check if other gas appliances in your home, like a hob, are working to ensure gas is reaching the propertyCheck if your gas meter has creditPress the 'Reset' button and wait for the boiler to restart
Find a Gas Safe engineer
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A boiler cover plan would cover faults like LC — 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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