I have recently noticed that the water circulating pump positioned in the airing cupboad by the hot water storage tank is still running after the boiler has gone off and the timer is off. It can run for over about a hour after the timer is set to go off before itself stopping. Having only just noticed this, should there be a delay in the pump stopping after the timer has stopped and the boiler has stopped or is it a fault with the 3 way switch that controlls hot water, heating? As an addition although the pump is running the radiators are not getting hot.