BoilerFaultCodes 264 High
Boiler Fault Code 264
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 264 appears across 1 boiler brand and 6 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler is struggling to breathe properly because it cannot pull in enough air to burn the gas safely, so it has turned itself off to prevent a hazard. (As reported on Worcester Bosch 24/28/35 CDi MkII)
Pick your boiler brand for the 264 fix
Source
Information for the 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 7 July 2026