BoilerFaultCodesYour boiler is failing to light the gas flame despite trying to start, which has caused the system to shut down for safety.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Lack of burner ignition (no ignition signal from the full sequence ignition device)
What causes this fault?
This fault occurs when the boiler's control system attempts to start a flame but cannot detect that one has successfully lit. This is usually caused by a worn-out ignition spark, a blockage in the gas supply, or a fault in the internal computer board that manages the startup sequence.
This issue can be more frequent during the first cold snap of winter when internal components are put under sudden stress after being idle during the summer.
DIY fix possible
Check that your gas pre-payment meter (if applicable) has credit.Verify that other gas appliances in your home, like a hob, are working correctly.Press and hold the reset button for a few seconds to try restarting 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
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