22 Emergency

Boiler Fault Code 22

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code 22 appears across 14 boiler brands and 31 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler is struggling to breathe because it cannot clear out exhaust gases properly, so it has safely shut itself down to prevent fumes from building up inside your home. (As reported on Baxi Combi 80 Maxflue)

Pick your boiler brand for the 22 fix

Alpha 22 5 models Atmos 22 3 models Baxi 22 1 model Biasi 22 2 models Daikin 22 1 model Glow-worm 22 1 model Grant 22 1 model Intergas 22 7 models Main 22 2 models Malvern 22 1 model Sime 22 2 models Unical 22 2 models Vokera 22 1 model Warmworld 22 2 models

Source

Information for the 22 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