I have a Baxi 105e combi boiler and hot water is only available from the bath tap. Turning on any other tap does not cause the DHW circuit to fire up. I have checked and I can clearly see the pushrod extending from the DWH differential valve to activate the microswitch when I turn on the bath hot water tap but the pushrod does not move if the other hot water taps or power shower is turned on. Any ideas why only one tap is working? If there was a component fault I would expect all taps to behave the same.
