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

Typical repair cost for the boiler DHW FLOW SWITCH fault is £90-180 including labour.

DHW FLOW SWITCH Medium

Boiler Fault Code DHW FLOW SWITCH

Also written as DHWFLOWSWITCH — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code DHW FLOW SWITCH 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 thinks you have a hot water tap turned on even when they are all closed, which may prevent your central heating from working properly. (As reported on Baxi 130 HE (range))

Pick your boiler brand for the DHW FLOW SWITCH fix

Baxi DHW FLOW SWITCH 3 models

Source

Information for the DHW FLOW SWITCH 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