High
Safety Thermostat neon on Baxi Promax Combi

Your boiler has shut itself down because it has become too hot inside, likely due to a circulation issue or a lack of water pressure.

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 has shut down in the event of the system or the boiler 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
Search the official register →

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