BoilerFaultCodes 326 Medium
Boiler Fault Code 326
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 326 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 is having trouble sensing the temperature of your hot water cylinder, which means it may struggle to provide consistent hot water. (As reported on Worcester Bosch Greenstar CDi Compact)
Pick your boiler brand for the 326 fix
Source
Information for the 326 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