How much does it cost to fix boiler error code S.22?

Typical repair cost for the boiler S.22 fault is £180-450 including labour.

S.22 High

Boiler Fault Code S.22

Also written as S22 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code S.22 appears across 2 boiler brands and 35 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 hot water is being called for, but it believes the pump is running when it shouldn't be or there is a circulation issue preventing proper operation. (As reported on Vaillant ecoTEC Pro / ecoTEC Plus)

Pick your boiler brand for the S.22 fix

Glow-worm S.22 9 models Vaillant S.22 26 models

Source

Information for the S.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 27 April 2026