BoilerFaultCodes 222 High
Boiler Fault Code 222
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 222 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 is struggling to detect the flow of water because of a faulty electronic sensor, which will prevent your heating and hot water from working correctly. (As reported on Worcester Bosch Greenstar Heatslave II)
Pick your boiler brand for the 222 fix
Source
Information for the 222 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