BoilerFaultCodes P22 High
Boiler Fault Code P22
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code P22 appears across 1 boiler brand and 2 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler has detected that the temperature of the water being heated for your taps and shower is not being measured or managed correctly by the internal sensors. (As reported on Alpha Pro Tec Plus)
Pick your boiler brand for the P22 fix
Source
Information for the P22 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