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

Typical repair cost for the Ideal Overheat light on fault is £90-250 including labour.

Overheat light on High

Ideal Overheat light on Fault Code

Q: What does the Ideal Overheat light on fault code mean?

Your boiler has become too hot and has automatically shut itself down to prevent damage.

Also written as OVERHEATLIGHTON — same fault.

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

Technical description: Safety temperature limiter has tripped due to excessive temperature; requires manual reset.

What causes the Ideal Overheat light on fault?

This fault occurs when the water inside the boiler exceeds a safe temperature limit, causing a safety switch to cut the power. The most common reasons are a pump failure that stops water from moving or a buildup of debris that blocks flow through the heat exchanger.

This issue is more frequent when heating is first turned on after summer, as pump components can seize up during long periods of inactivity.

Typical repair cost £90-250 (including labour)

DIY fix possible

Wait for the boiler to cool down completely (at least 20 minutes)Locate the manual reset button, typically found behind the small pull-down door or on the control panelPress the button firmly to reset the safety trip and wait for the boiler to restart

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Ideal models that show the Overheat light on fault code

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

Concord Super Series 4 Repair: £90-250

Source

Ideal Overheat light on 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