BoilerFaultCodes 264 High
Boiler Fault Code 264
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 264 appears across 2 boiler brands and 5 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 air supply needed for safe combustion has been interrupted while it was running, causing it to shut down for safety. (As reported on Worcester Bosch Greenstar CDi Compact)
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 31 August 2026