How much does it cost to fix boiler error code Overheat (Red LED)?

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

Overheat (Red LED) High

Boiler Fault Code Overheat (Red LED)

Also written as OVERHEATREDLED — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code Overheat (Red LED) appears across 2 boiler brands and 3 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 getting too hot and has automatically switched itself off to prevent any damage. (As reported on Potterton Housewarmer)

Pick your boiler brand for the Overheat (Red LED) fix

Baxi Overheat (Red LED) 2 models Potterton Overheat (Red LED) 1 model

Source

Information for the Overheat (Red LED) 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