Recently I fitted a Honeywell V4073A mid position valve, I have a Danfoss SET3M heating/hot water programmer, a Danfoss RMT-230 room stat and a CS cylinder stat. I have wired all as far as I can see as recomended wiring diagrams but when I switch on the heating with the room stat up the boiler fires and the pump starts, pipes heat up but it does not pump around the radiators until i turn the hot water switch on the programmer. I should imagine there may be a fault with the valve connections but do not want to just swap the wires over in case it damages something.