How much does it cost to fix boiler error code DHW thermistor fault?

Typical repair cost for the boiler DHW thermistor fault fault is £120-180 including labour.

DHW thermistor fault Medium

Boiler Fault Code DHW thermistor fault

Also written as DHWTHERMISTORFAULT — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 7 July 2026

Fault code DHW thermistor fault appears across 2 boiler brands 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 accurately measure the temperature of the water being heated for your taps, which prevents it from providing consistent hot water. (As reported on Vokera Compact HE)

Pick your boiler brand for the DHW thermistor fault fix

Keston DHW thermistor fault 1 model Vokera DHW thermistor fault 1 model

Source

Information for the DHW thermistor fault 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