BoilerFaultCodes LED4 Low
Boiler Fault Code LED4
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code LED4 appears across 1 boiler brand and 1 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler is receiving electrical power and is currently functioning normally, as this light is a status indicator rather than a fault. (As reported on Ideal Mexico Super 40ff - 80ff)
Pick your boiler brand for the LED4 fix
Source
Information for the LED4 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