How difficult can it be to get it right when Worcester produce this wiring guide
Grab your voltage indicator and make sure the you haven't accidentally wired the permanent live Into the pump. I've done it before and so has everyone else it's just a silly mistake WE ALL MAKE. I once connected 8 dual zone combo hearings in a day and got a few wrong. No biggy mate. It it's wired right check the room stat or the boiler you might have the wrong sw wire to the boiler.
Grab your voltage indicator and make sure the you haven't accidentally wired the permanent live Into the pump. I've done it before and so has everyone else it's just a silly mistake WE ALL MAKE. I once connected 8 dual zone combo hearings in a day and got a few wrong. No biggy mate. It it's wired right check the room stat or the boiler you might have the wrong sw wire to the boiler.