BoilerFaultCodesYour boiler has tried to light several times but cannot establish a flame, meaning it has shut down for safety to prevent gas build-up.
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's control system attempts to start a flame but fails to detect one after several tries. It is often caused by a lack of gas reaching the burner, a dirty or damaged ignition spark, or a sensor that can no longer 'see' the flame even if it has lit. In some cases, a blocked flue or internal component failure prevents the correct mix of air and gas required for ignition.
This fault is more common during extreme cold snaps, as the external gas meter regulator can freeze or the condensate drainage pipe can ice up, causing the boiler to shut down for safety.
DIY fix possible
Check if your gas supply is active by testing another gas appliance like a hob.If you have a prepay meter, ensure you have sufficient credit.In freezing temperatures, check if the external condensate pipe has frozen.Reset the boiler by turning the mode knob to 'RE' and back to your desired setting.
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A boiler cover plan would cover faults like L2 — 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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