BoilerFaultCodes 175 Low
Boiler Fault Code 175
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 175 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's internal digital clock settings are currently corrupted or have been reset, preventing the unit from following your programmed heating schedule. (As reported on Sime Dewy 30/130 HE FS)
Pick your boiler brand for the 175 fix
Source
Information for the 175 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