BoilerFaultCodes Sensor Flow High
Boiler Fault Code Sensor Flow
Also written as SENSORFLOW — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code Sensor Flow 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 struggling to accurately measure the temperature of the water flowing through it, so it has shut down as a precaution to prevent overheating. (As reported on Potterton Envoy 30)
Pick your boiler brand for the Sensor Flow fix
Source
Information for the Sensor Flow 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