High
Overheat thermostat on Ideal Classic Slimline FF 330 360

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

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

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

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

Engineer required

This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

Find a Gas Safe engineer
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