L2 High

Pro L2 Fault Code

The Pro L2 fault code means: your boiler has tried to light several times but has failed to stay on, meaning your heating and hot water will not work until it is reset or repaired.. It appears on 1 Pro model in our database.

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description: IGNITION LOCKOUT
Typical repair cost £80-250 (including labour)

DIY fix possible

Check if you have credit on your gas meterEnsure the gas emergency control valve is in the 'open' positionPress and hold the 'Reset' button for five seconds

Find a Gas Safe engineer

Search the official register for a qualified engineer in your area.

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Pro models that show the L2 fault code

Click a model for the full fault code list and model-specific repair notes.

Source

Pro L2 fault code information on this page is sourced and cross-checked against the official Pro service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026