BoilerFaultCodes S.57 Low
Boiler Fault Code S.57
Also written as S57 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code S.57 appears across 1 boiler brand and 9 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler has temporarily paused operation to prevent potential overheating and will restart automatically once it has cooled down. (As reported on Vaillant ecoTEC Pro / ecoTEC Plus)
Pick your boiler brand for the S.57 fix
Source
Information for the S.57 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