BoilerFaultCodes 240 High
Boiler Fault Code 240
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 240 appears across 1 boiler brand and 3 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 signal from one of its internal temperature sensors, meaning it cannot correctly measure the heat of the water and has stopped running to stay safe. (As reported on Worcester Bosch 1000)
Pick your boiler brand for the 240 fix
Source
Information for the 240 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