BoilerFaultCodesYour boiler has safety-locked itself to stop the flow of gas, likely because it failed to light or lost its flame.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: In the unlikely event of a fault developing with your boiler, the supply of gas to the burner will be terminated automatically.
What causes this fault?
This fault occurs when the boiler tries to ignite but fails to establish or maintain a stable flame, prompting the system to shut off the gas for safety. The most common reasons include a worn-out ignition spark, a blockage in the gas supply, or an issue with the internal sensors that detect the flame.
This issue can be more frequent during extreme cold snaps if the gas pressure in the local network fluctuates or if moisture has affected the external gas meter.
DIY fix possible
Locate the mode selector switch on the front panel.Turn the switch to the 'RESET' position and hold it for a few seconds.Return the switch to your desired mode (heating or hot water) and wait for the boiler to restart.
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A boiler cover plan would cover faults like Reset light on — 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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