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

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

Red LED I (Overheat) High

Boiler Fault Code Red LED I (Overheat)

Also written as REDLEDIOVERHEAT — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code Red LED I (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 automatically turned itself off because it has detected that the water inside is getting dangerously hot. (As reported on Ariston Egis 24 MFFI)

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

Ariston Red LED I (Overheat) 1 model

Source

Information for the Red LED I (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