BoilerFaultCodes Return sensor faulty High
Boiler Fault Code Return sensor faulty
Also written as RETURNSENSORFAULTY — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code Return sensor faulty 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 the ability to measure the temperature of the water returning to it, so it has safely shut down to prevent overheating. (As reported on Ferroli Econcept 100)
Pick your boiler brand for the Return sensor faulty fix
Source
Information for the Return sensor faulty 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