High
BOILER OVERHEAT STAT TRIPPED on Grant Spira

Your boiler has automatically shut down to prevent damage because it has become too hot to operate safely.

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.

What the manual says

Manufacturer manual

The boiler overheat thermostat has activated. Check if the system is full of water, vented, the pump is operational, or if there is a restriction to water flow.

From this model's manual
Verified against the Grant Spira installation & service manual.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

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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