How much does it cost to fix boiler error code Fault on DHW sensor?

Typical repair cost for the boiler Fault on DHW sensor fault is £120-200 including labour.

Fault on DHW sensor Medium

Boiler Fault Code Fault on DHW sensor

Also written as FAULTONDHWSENSOR — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 7 July 2026

Fault code Fault on DHW sensor appears across 1 boiler brand and 2 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 detect the temperature of the water coming out of your hot taps, which means it cannot heat your hot water correctly. (As reported on Heatline S24 / S30)

Pick your boiler brand for the Fault on DHW sensor fix

Heatline Fault on DHW sensor 2 models

Source

Information for the Fault on DHW 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