High
FLUE OVERHEAT THERMOSTAT on Ideal Turbo2 24

Your boiler has shut down because the exhaust gases have become too hot, which is a safety measure to prevent damage or dangerous fumes.

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

Safety device that triggers if flue temperatures exceed limits

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.

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