BoilerFaultCodes L02 High
Boiler Fault Code L02
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code L02 appears across 1 boiler brand and 3 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler has failed to light several times and has locked itself for safety, meaning you have no heating or hot water. (As reported on Ideal Logic Code Combi ESP1)
Pick your boiler brand for the L02 fix
Source
Information for the L02 fault code is sourced from the official service / installation manual for each model that displays it. Read more about how we source fault codes →
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026