BoilerFaultCodes 1074 W High
Boiler Fault Code 1074 W
Also written as 1074W — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 1074 W 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 communication with its internal thermometer, meaning it cannot safely tell how hot the water is getting and has shut down as a precaution. (As reported on Worcester Bosch Hideaway 90)
Pick your boiler brand for the 1074 W fix
Source
Information for the 1074 W 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