BoilerFaultCodes Flue gas sensor faulty High
Boiler Fault Code Flue gas sensor faulty
Also written as FLUEGASSENSORFAULTY — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code Flue gas 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 stopped working because it can no longer accurately read the temperature of the exhaust chimney, meaning it has shut down as a safety precaution. (As reported on Ferroli Econcept 100)
Pick your boiler brand for the Flue gas sensor faulty fix
Source
Information for the Flue gas 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