BoilerFaultCodesPro L 2 Fault Code
Also written as L2 — same fault.
The Pro L 2 fault code means: your boiler has failed to ignite after several attempts, meaning it has shut itself down for safety and currently cannot provide heating or hot water.. It appears on 1 Pro model in our database.
Technical description: If the boiler does not light code will be displayed. After 5 attempts the boiler will lock out and display fault code constantly.
DIY fix possible
Check that your gas emergency control valve is open and that other gas appliances in your home are working.If you have a prepaid gas meter, ensure it has sufficient credit.Press and hold the 'Restart' button for two seconds to clear the fault.
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Pro models that show the L 2 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Pro L 2 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