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

Typical repair cost for the boiler Red LED (Overheat) fault is £100-250 including labour.

Red LED (Overheat) High

Boiler Fault Code Red LED (Overheat)

Also written as REDLEDOVERHEAT — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code Red LED (Overheat) appears across 1 boiler brand 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 switched itself off because it has gotten too hot, likely due to a circulation problem or a temporary blockage. (As reported on Potterton Housewarmer)

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

Potterton Red LED (Overheat) 3 models

Source

Information for the Red LED (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