🙂I had a look lastnight and checked the power, there seems to be no signal going to the motor from the programmer to tell the CH to come on, By rights once that programmer tells it to, the motor should move the valve in theory? Theres defo power going to the motor i check it with a multimeter. Then i just had to move that switch you talked about over but once i let go it moved back making a whirring noise, so then i tryed again and switched it right up to the end and i could then here the CH sytem kick in, but a soon as pressure i released off the switch it knocks off the CH off, even if the switch is put into the slot its not enough to kick in the CH you basically have to wedge the switch right over for it to stay on, I told them that its temp fixed but they have to use the wall stat to turn CH on and off now when they used the programmer, I think its the motor myself but if you got any ideas it would be appreciated, sorry about the long winded question but trying to get the most info in. jep