BoilerFaultCodes LED Flashing High
Boiler Fault Code LED Flashing
Also written as LEDFLASHING — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code LED Flashing 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's internal fan is failing to start or power up, which means the unit cannot safely clear exhaust gases and will refuse to ignite. (As reported on Johnson Starley J32 System ET)
Pick your boiler brand for the LED Flashing fix
Source
Information for the LED Flashing 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