BoilerFaultCodes i22 Low
Boiler Fault Code i22
Also written as I22 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code i22 appears across 1 boiler brand and 1 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler is displaying a specific tracking code that identifies its power configuration, which usually appears after an internal control module has been replaced or reset. (As reported on Worcester Bosch Greenstar Heatslave II)
Pick your boiler brand for the i22 fix
Source
Information for the i22 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 27 April 2026