BoilerFaultCodes 2963 High
Boiler Fault Code 2963
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 2963 appears across 1 boiler brand and 10 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 sensors monitoring its internal temperature are giving incorrect readings or have failed, causing the system to shut down for safety. (As reported on Worcester Bosch Greenstar 8000 Life/Style)
Pick your boiler brand for the 2963 fix
Source
Information for the 2963 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