BoilerFaultCodes EC High
Boiler Fault Code EC
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code EC appears across 2 boiler brands 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 has detected that the exhaust gases are getting too hot, too quickly, so it has turned itself off to prevent internal damage. (As reported on Worcester Bosch Greenstar 12i System)
Pick your boiler brand for the EC fix
Source
Information for the EC 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 7 July 2026