How much does it cost to fix Ideal error code Overheat thermostat?

Typical repair cost for the Ideal Overheat thermostat fault is £120-250 including labour.

Overheat thermostat High

Ideal Overheat thermostat Fault Code

Q: What does the Ideal Overheat thermostat fault code mean?

Your boiler has become too hot and has automatically turned itself off to prevent damage or dangerous conditions.

Also written as OVERHEATTHERMOSTAT — same fault.

The Ideal Overheat thermostat fault code means: your boiler has become too hot and has automatically turned itself off to prevent damage or dangerous conditions.. It appears on 2 Ideal models in our database.

Technical description: The boiler is fitted with a safety 'cutout' thermostat. This will shut down the boiler in the event of overheating.

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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Ideal models that show the Overheat thermostat fault code

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

Source

Ideal Overheat thermostat 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