BoilerFaultCodes 1023 Low
Boiler Fault Code 1023
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 1023 appears across 1 boiler brand and 8 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler has been running for a long continuous period and needs to be reset to ensure its internal monitors can perform a safety self-check. (As reported on Worcester Bosch Greenstar 8000 Life/Style)
Pick your boiler brand for the 1023 fix
Source
Information for the 1023 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