BoilerFaultCodesYour boiler is failing to light the flame properly, meaning you will not have any heating or hot water until the issue is resolved.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: No flame signal after ignition burner control unit could need replacing
What causes this fault?
This fault occurs when the boiler's internal computer tries to start a fire but cannot detect a stable flame. The most common reasons are a lack of gas reaching the burner, dirty sensors failing to 'see' the flame, or a fault within the electronic control board that manages the ignition process.
This fault can be more frequent during the first cold snap of winter, as gas valves may stick after long periods of inactivity or external gas regulators may be affected by freezing temperatures.
DIY fix possible
Check if your gas supply is working by testing other gas appliances like a hobEnsure your gas meter has credit if you use a pre-payment meterPress the Reset button on the boiler display panel once to attempt a restart
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
A boiler cover plan would cover faults like 227 V — no call-out fees, no surprises.
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Could it be time for a new boiler?
If repair costs are adding up, a new energy-efficient boiler could be the smarter long-term choice.
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