BoilerFaultCodesYour boiler is failing to light the gas flame and has shut itself 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: Flame is not detected. The spark stops, the gas valve closes, and the fan continues to run.
What causes this fault?
This fault occurs when the boiler attempts to start up but cannot confirm that a flame has successfully lit. The most common reasons are a worn-out ignition spark that fails to catch the gas, or a dirty sensor that cannot 'see' the flame even after it has started. It can also be caused by a lack of gas reaching the unit due to a faulty internal valve.
DIY fix possible
Check that your gas supply is turned on and other gas appliances are workingPress and hold the reset button for several seconds to restart the ignition sequenceCheck outside to ensure the white condensate pipe hasn't frozen in cold weather
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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