BoilerFaultCodes DHW Flow Switch section High
Boiler Fault Code DHW Flow Switch section
Also written as DHWFLOWSWITCHSECTION — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code DHW Flow Switch section 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 failing to detect when the hot water is turned on, meaning the system won't fire up to heat the water for your taps. (As reported on Baxi Combi 80e)
Pick your boiler brand for the DHW Flow Switch section fix
Source
Information for the DHW Flow Switch section 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