BoilerFaultCodes 285 Medium
Boiler Fault Code 285
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 285 appears across 1 boiler brand and 4 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 the water returning to it is much hotter than expected, suggesting heat isn't circulating properly through your radiators. (As reported on Worcester Bosch 1000)
Pick your boiler brand for the 285 fix
Source
Information for the 285 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