How much does it cost to fix boiler error code Flue temperature probe lockout?

Typical repair cost for the boiler Flue temperature probe lockout fault is £120-£240 including labour.

Flue temperature probe lockout High

Boiler Fault Code Flue temperature probe lockout

Also written as FLUETEMPERATUREPROBELOCKOUT — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code Flue temperature probe lockout 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 completely because it detected that the exhaust gases were becoming too hot, which is a safety protocol to protect the internal components. (As reported on Biasi Riva Advance M96.24SM)

Pick your boiler brand for the Flue temperature probe lockout fix

Biasi Flue temperature probe lockout 1 model

Source

Information for the Flue temperature probe lockout 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