How much does it cost to fix boiler error code Return sensor?

Typical repair cost for the boiler Return sensor fault is £120-200 including labour.

Return sensor High

Boiler Fault Code Return sensor

Also written as RETURNSENSOR — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code Return sensor 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 lost its ability to measure the temperature of the water returning to it, so it has shut down to prevent potential damage. (As reported on Potterton Envoy 30)

Pick your boiler brand for the Return sensor fix

Potterton Return sensor 1 model

Source

Information for the Return sensor 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