BoilerFaultCodesYour boiler has failed to ignite and has locked itself out for safety, meaning you will not have any heating or hot water until it is reset.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: The boiler does not light after 10 seconds
What causes this fault?
This fault occurs when the boiler tries to light the burner but fails to detect a flame within its 10-second safety window. The most common reasons are a lack of gas reaching the unit, a worn-out ignition spark, or a component failure that prevents the internal parts from communicating correctly.
This fault is more common during the first cold snap of winter, when increased demand can highlight failing components or when external gas regulators are prone to sticking.
DIY fix possible
Check if other gas appliances in your home (like a hob) are working to ensure gas is being supplied.Ensure your credit meter has sufficient balance if you have a prepay system.Turn the control knob to the 'Reset' position, wait five seconds, then turn it back to the 'On' position.
Find a Gas Safe engineer
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