BoilerFaultCodes Fault on Hot Water Sensor Medium
Boiler Fault Code Fault on Hot Water Sensor
Also written as FAULTONHOTWATERSENSOR — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code Fault on Hot Water Sensor 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 struggling to accurately measure the temperature of the water it is heating for your taps, which will likely prevent you from having a consistent supply of hot water. (As reported on Potterton Performa 28i)
Pick your boiler brand for the Fault on Hot Water Sensor fix
Source
Information for the Fault on Hot Water Sensor 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