BoilerFaultCodes DHW SENSOR LOCKOUT High
Boiler Fault Code DHW SENSOR LOCKOUT
Also written as DHWSENSORLOCKOUT — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code DHW SENSOR LOCKOUT 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 has stopped producing hot water because it has detected a fault with the sensor that measures the temperature of the water going to your taps. (As reported on Johnson Starley Quantec C)
Pick your boiler brand for the DHW SENSOR LOCKOUT fix
Source
Information for the DHW SENSOR LOCKOUT 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