BoilerFaultCodesYour boiler is failing to light the gas flame despite several attempts, which means your heating and hot water will not work.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: No ignition after restart – check gas supply, gas valve operation and ignitor electrode spark generation
What causes this fault?
This fault occurs when the boiler's internal computer tries to start the combustion process but cannot detect a sustained flame. The most common reasons are a lack of gas reaching the unit, a worn-out sparking electrode that can't provide a light, or a faulty gas valve that isn't opening properly.
This issue is more frequent during extreme cold spells, as external gas meters can sometimes freeze or pressure can drop when local demand is at its peak.
DIY fix possible
Check that your gas emergency control valve is turned onIf you have a pre-payment meter, check that you have creditCheck if other gas appliances, like a hob, are working correctlyTry resetting the boiler by pressing the reset button
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 E02 — 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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