BoilerFaultCodes E128 High
Boiler Fault Code E128
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code E128 appears across 2 boiler brands and 3 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler's flame has gone out because air has entered the gas pipes or the gas supply is not steady enough to keep it running. (As reported on Baxi 124 Combi)
Pick your boiler brand for the E128 fix
Source
Information for the E128 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