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.

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

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

Q: 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.

Also written as REDLEDIOVERHEAT — same fault.

The Ariston Red L.E.D. I (Overheat) fault code means: your boiler has automatically turned itself off because it has detected that the water inside is running much hotter than it should be.. It appears on 5 Ariston models in our database.

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

Typical repair cost £120-250 (including labour)

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Ariston models that show the Red L.E.D. I (Overheat) fault code

Click a model for the full fault code list and model-specific repair notes.

Source

Ariston Red L.E.D. I (Overheat) fault code information on this page is sourced and cross-checked against the official Ariston service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026