BoilerFaultCodes LED3 High
Boiler Fault Code LED3
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code LED3 appears across 2 boiler brands and 8 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler is stuck in its starting sequence because it cannot confirm the fan is working correctly to clear away waste gases. (As reported on Ideal Mexico Super 40ff - 80ff)
Pick your boiler brand for the LED3 fix
Source
Information for the LED3 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