BoilerFaultCodes F28 High
Boiler Fault Code F28
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code F28 appears across 2 boiler brands and 10 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler is failing to light the gas flame, which means your heating and hot water will not work until the system is reset or repaired. (As reported on Glow-worm Ultracom 35 Store)
Pick your boiler brand for the F28 fix
Source
Information for the F28 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 31 August 2026