BoilerFaultCodes EC256 High
Boiler Fault Code EC256
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code EC256 appears across 1 boiler brand and 1 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler's computer system has detected an internal electronic fault, preventing the heating and hot water from starting up. (As reported on Worcester Bosch GB162)
Pick your boiler brand for the EC256 fix
Source
Information for the EC256 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