How much does it cost to fix boiler error code Red L.E.D. I (Overheat)?

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

Red L.E.D. I (Overheat) High

Boiler Fault Code Red L.E.D. I (Overheat)

Also written as REDLEDIOVERHEAT — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code Red L.E.D. I (Overheat) appears across 1 boiler brand and 5 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 running much hotter than it should be. (As reported on Ariston Micro Combi 27 MFFI)

Pick your boiler brand for the Red L.E.D. I (Overheat) fix

Ariston Red L.E.D. I (Overheat) 5 models

Source

Information for the Red L.E.D. 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