Overheat Thermostat Cutout High

Ideal Overheat Thermostat Cutout Fault Code

Also written as OVERHEATTHERMOSTATCUTOUT — same fault.

The Ideal Overheat Thermostat Cutout fault code means: your boiler has become too hot and has automatically shut itself down to prevent damage or safety issues.. It appears on 1 Ideal model in our database.

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description: This thermostat will extinguish the pilot and shut down the boiler in the event of overheating.
Typical repair cost £90-180 (including labour)

DIY fix possible

Wait for the boiler to cool down completely (at least 20 minutes).Locate the reset button located on the front or underside of the control box.Press the reset button and attempt to relight the pilot light following the instructions on the boiler's front panel.

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Ideal models that show the Overheat Thermostat Cutout fault code

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

Source

Ideal Overheat Thermostat Cutout fault code information on this page is sourced and cross-checked against the official Ideal service / installation manuals for each affected model.

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