What does the Ariston Red L.E.D. I (Overheat) fault code mean?

Your boiler has automatically turned itself off because it has detected that the water inside is running much hotter than it should be.

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

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

Shutdown due to overheating - safety limit exceeded for the temperature of the water in the boilers exchanger

This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

Each noise points to a different fault.

Almost always a stuck diverter valve on combis.

Sludge build-up — needs flushing, not bleeding.