BoilerFaultCodesYour boiler has lost its flame while it was running, which means it has stopped providing heating and hot water for safety reasons.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Flame error – no flame during operation.
What causes this fault?
This fault occurs when the boiler successfully lights but the internal sensors lose track of the flame while it is firing. It is often caused by a dirty or worn-out sensing probe that can no longer 'see' the fire, or a faulty gas valve that isn't providing a steady enough flow of fuel to maintain the combustion. Without a stable signal that the flame is safely lit, the boiler shuts down as a protective measure.
DIY fix possible
Check if other gas appliances in your home, like a hob, are working to confirm gas supply.Ensure your gas meter has credit if you use a prepay meter.Press and hold the Reset button for five seconds to see if the boiler restarts.
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 H.03 – .02 — 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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