BoilerFaultCodes C1 264 High
Boiler Fault Code C1 264
Also written as C1264 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code C1 264 appears across 1 boiler brand and 12 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 internal fan responsible for venting exhaust gases has stopped working, so it has safely shut itself down to prevent any unsafe operation. (As reported on Worcester Bosch Greenstar CDi Compact)
Pick your boiler brand for the C1 264 fix
Source
Information for the C1 264 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