BoilerFaultCodes S.29 Low
Boiler Fault Code S.29
Also written as S29 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code S.29 appears across 2 boiler brands 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 is operating normally and performing its standard heating function without any active issues. (As reported on Viessmann Vitodens 222-F B2TF)
Pick your boiler brand for the S.29 fix
Source
Information for the S.29 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 31 August 2026