BoilerFaultCodes 223 High
Boiler Fault Code 223
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 223 appears across 1 boiler brand and 3 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler has lost the connection to one of its temperature sensors, meaning it cannot accurately measure how hot the water is and has stopped working as a safety precaution. (As reported on Worcester Bosch 1000)
Pick your boiler brand for the 223 fix
Source
Information for the 223 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