BoilerFaultCodes L C High
Boiler Fault Code L C
Also written as LC — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code L C appears across 1 boiler brand and 2 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler has stopped working because it has tried to reset itself five times in a short period due to a persistent underlying fault. (As reported on Ideal Instinct2 24)
Pick your boiler brand for the L C fix
Source
Information for the L C 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 7 July 2026