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

Typical repair cost for the boiler DHW Fault fault is £120-£250 including labour.

DHW Fault Medium

Boiler Fault Code DHW Fault

Also written as DHWFAULT — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code DHW Fault 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 detected a problem with the domestic hot water system, meaning you likely have no hot water but your central heating may still function. (As reported on Baxi 130 HE (range))

Pick your boiler brand for the DHW Fault fix

Baxi DHW Fault 3 models

Source

Information for the DHW 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 27 April 2026