Low
2.4 on British Gas RD 430i

Your boiler is temporarily pausing its operation to prevent the system from turning on and off too frequently, which protects the internal components from unnecessary wear and tear.

Monitor it

This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.

What the manual says

Manufacturer manual

Anti-cycle time

From this model's manual
Verified against the British Gas Rd 430i System 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.

DIY fix possible

Check that your room thermostat is set to the desired temperature.Ensure all radiator valves are open to allow heat to dissipate.Wait 15-20 minutes for the countdown timer to finish, as the boiler will likely restart automatically.

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Avoid the next call-out bill

A cover plan would handle faults like 2.4: no call-out fees, no surprise bills.

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