BoilerFaultCodes 256 324 High
Boiler Fault Code 256 324
Also written as 256324 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 256 324 appears across 1 boiler brand and 1 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler has lost the ability to accurately measure the temperature of the water being heated for your taps and shower, so it has safely shut down to prevent overheating. (As reported on Worcester Bosch Greenstar CDi Compact)
Pick your boiler brand for the 256 324 fix
Source
Information for the 256 324 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