BoilerFaultCodes NO CH BUT DHW OK Medium
Boiler Fault Code NO CH BUT DHW OK
Also written as NOCHBUTDHWOK — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code NO CH BUT DHW OK appears across 1 boiler brand and 1 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler is working properly to provide hot water, but it is failing to turn on your radiators to heat your home. (As reported on Ideal Vogue Combi)
Pick your boiler brand for the NO CH BUT DHW OK fix
Source
Information for the NO CH BUT DHW OK 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