BoilerFaultCodesYour boiler has tried to light several times but has failed to create a flame, causing the system to shut down for safety.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Lockout due to ignition failure
What causes this fault?
This fault occurs when the boiler's control system attempts to start the combustion process but cannot detect a stable flame. The most common reasons include a worn-out ignition spark, a blockage in the gas supply, or an internal component failing to open the gas valve correctly.
This issue is more frequent during particularly cold spells when high demand on the gas network or a frozen condensate pipe can prevent the boiler from lighting successfully.
DIY fix possible
Check if other gas appliances, like a hob, are working to confirm gas supply.If you have a prepaid gas meter, ensure it has credit.Press and hold the 'Reset' button for five seconds 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 E01 — no call-out fees, no surprises.
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Potterton Powermax HE is discontinued — time for a new one?
Parts for discontinued models can be hard to find and expensive. A new A-rated boiler could save you money on both repairs and energy bills.
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