Hozelock AC1+ motor running continually when batteries installed. For those of you who have had one apart could you tell me if there are limit switches or proximity switches or current sensing components on PCB to tell the unit when the valve is in the open or shut position! Bought this one off a popular auction site "New", ho hum. I'm awaiting a proper response from the seller (yawn). I have one already and another two on the way (new). Just in case I have to perform the casing separation surgery as mentioned previously. Any advice would be gratefully received.