BoilerFaultCodes FLUE OVERHEAT THERMOSTAT High
Boiler Fault Code FLUE OVERHEAT THERMOSTAT
Also written as FLUEOVERHEATTHERMOSTAT — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code FLUE OVERHEAT THERMOSTAT 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 shut down because the exhaust gases have become too hot, which is a safety measure to prevent damage or dangerous fumes. (As reported on Ideal Turbo2 24)
Pick your boiler brand for the FLUE OVERHEAT THERMOSTAT fix
Source
Information for the FLUE OVERHEAT THERMOSTAT 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