Your boiler is temporarily pausing because it has already reached the target temperature you set for your radiators or hot water.

DIY fix possible

Check your room thermostat or boiler dial settings to see if they are set lower than the current room temperature.Wait 10 to 15 minutes as the boiler will restart automatically once the water temperature drops.Ensure radiators are not turned off in every room, as the system needs a certain amount of flow to work correctly.