How much does it cost to fix boiler error code Flue overheat?

Typical repair cost for the boiler Flue overheat fault is £150-450 including labour.

Flue overheat Emergency

Boiler Fault Code Flue overheat

Also written as FLUEOVERHEAT — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code Flue overheat 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 it detected that the exhaust gases leaving the system have reached a dangerously high temperature. (As reported on Worcester Bosch Greenstar 12i System)

Pick your boiler brand for the Flue overheat fix

Worcester Bosch Flue overheat 1 model

Source

Information for the Flue overheat 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