BoilerFaultCodes Water temperature too hot High
Boiler Fault Code Water temperature too hot
Also written as WATERTEMPERATURETOOHOT — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code Water temperature too hot 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 sensed that the water inside it is getting dangerously hot and has shut itself down to prevent damage. (As reported on Worcester Bosch 24si II)
Pick your boiler brand for the Water temperature too hot fix
Source
Information for the Water temperature too hot 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