How much does it cost to fix boiler error code FLUE SENSOR?

Typical repair cost for the boiler FLUE SENSOR fault is £120-£200 including labour.

FLUE SENSOR High

Boiler Fault Code FLUE SENSOR

Also written as FLUESENSOR — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code FLUE 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 detected a problem with the sensor that monitors the safety of the exhaust gases, and it has shut down to prevent overheating. (As reported on Johnson Starley Warmcair DW)

Pick your boiler brand for the FLUE SENSOR fix

Johnson Starley FLUE SENSOR 1 model

Source

Information for the FLUE 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