BoilerFaultCodes C1264 High
Boiler Fault Code C1264
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code C1264 appears across 1 boiler brand and 3 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler has stopped working because the internal fan, which is needed to safely clear waste gases, has either lost power or stopped communicating with the main control board. (As reported on Worcester Bosch GB162)
Pick your boiler brand for the C1264 fix
Source
Information for the C1264 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