BoilerFaultCodes A2.2 High
Boiler Fault Code A2.2
Also written as A22 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code A2.2 appears across 1 boiler brand and 6 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler's water circulation pump is struggling to operate or has stopped, which prevents heat from moving around your radiators or hot water cylinder. (As reported on Grant Vortex Eco)
Pick your boiler brand for the A2.2 fix
Source
Information for the A2.2 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