BoilerFaultCodes 1012 High
Boiler Fault Code 1012
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 1012 appears across 1 boiler brand and 2 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 components are having trouble communicating with the main control board, similar to a computer losing its connection to a keyboard. (As reported on Worcester Bosch Greenstar 2000)
Pick your boiler brand for the 1012 fix
Source
Information for the 1012 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