BoilerFaultCodesYour boiler has failed to light several times and has locked itself for safety, meaning you have no heating or hot water.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Ignition Lockout
What causes this fault?
This fault occurs when the boiler attempts to ignite the gas several times but fails to detect a sustained flame. The most common reasons include a lack of gas reaching the burner, a worn-out ignition electrode that can no longer create a spark, or a faulty gas valve preventing the fuel from flowing.
This fault is more frequent during extreme cold spells, as external gas meters or regulators can freeze, or the condensate discharge pipe can become blocked with ice, preventing the boiler from lighting.
DIY fix possible
Check that your gas supply is turned on (check other gas appliances like a hob).If you have a prepay meter, ensure there is sufficient credit.Press and hold the 'Reset' button for 2 seconds to see if the boiler restarts.
Find a Gas Safe engineer
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Gas Safe Register →Protect yourself from future repair bills
A boiler cover plan would cover faults like L02 — 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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