How much does it cost to fix boiler error code Overheat LED illuminated?

Typical repair cost for the boiler Overheat LED illuminated fault is £120-250 including labour.

Overheat LED illuminated High

Boiler Fault Code Overheat LED illuminated

Also written as OVERHEATLEDILLUMINATED — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code Overheat LED illuminated appears across 1 boiler brand and 8 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 that it is running too hot and has automatically shut down to prevent damage, meaning you currently have no heating or hot water. (As reported on Halstead Best 80)

Pick your boiler brand for the Overheat LED illuminated fix

Halstead Overheat LED illuminated 8 models

Source

Information for the Overheat LED illuminated 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