How much does it cost to fix boiler error code Sensor Fault (Flow or Return)?

Typical repair cost for the boiler Sensor Fault (Flow or Return) fault is £120-220 including labour.

Sensor Fault (Flow or Return) High

Boiler Fault Code Sensor Fault (Flow or Return)

Also written as SENSORFAULTFLOWORRETURN — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code Sensor Fault (Flow or Return) 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 working because it is unable to accurately measure the temperature of the water circulating inside the system. (As reported on Potterton Suprima HE)

Pick your boiler brand for the Sensor Fault (Flow or Return) fix

Potterton Sensor Fault (Flow or Return) 1 model

Source

Information for the Sensor Fault (Flow or Return) 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