OVERHEAT NEON High

Ideal OVERHEAT NEON Fault Code

Also written as OVERHEATNEON — same fault.

The Ideal OVERHEAT NEON fault code means: your boiler has switched itself off because it has become too hot to operate safely.. 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: Neon indicator showing water or flue overheat thermostat has tripped
Typical repair cost £120-280 (including labour)

DIY fix possible

Ensure all radiator valves are fully openAllow the boiler to cool down for at least 30 minutesLocate the reset button on the control panel and press it firmly

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Ideal models that show the OVERHEAT NEON fault code

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

Source

Ideal OVERHEAT NEON 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