Your boiler is taking a short, programmed break to prevent it from turning on and off too frequently, which helps save energy and protect its internal parts.

Anti cycling period

What causes this fault?

This occurs when the boiler has reached its target temperature very quickly and needs to pause before firing up again. It is often triggered because the heat has nowhere to go, usually because your radiators are already hot or the room thermostat has been satisfied. By waiting a few minutes, the boiler prevents unnecessary wear and tear caused by 'short-cycling'.