BoilerFaultCodesYour boiler is struggling to ignite or detect a flame at the beginning of its start-up process.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Error during start-up procedure (requires 3 minute venting cycle after resolution)
What causes this fault?
This fault occurs when the boiler tries to light the burner but fails to detect a consistent flame. The most common reasons are a worn-out ignition spark that can no longer light the gas, or a dirty sensor that cannot tell the boiler the flame is safely lit. In some cases, it may also be caused by an insufficient gas supply or a faulty internal valve.
This fault is more frequent during the first cold snap of winter, as internal components that have been idle over summer may struggle to operate correctly when first under heavy load.
DIY fix possible
Check that your gas supply is turned on and other gas appliances are working.If it is freezing outside, check that your condensate discharge pipe hasn't frozen.Press the Reset button for two seconds and wait for the mandatory 3-minute venting cycle to finish.
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