central heating heats the radiators, but not the water. boiler to 2x 2port valves. one for rads & the other for the water. If you open the water valve manually we have all the hot water we want, but it will not open itself-it is a brand new valve. Please can you help, any advise would be gratefully accepted.

Bryn, March 2009

check the sycronmotor take coveroff and put thehot water see if sycronmotor moving if not check any wire come off check junction box were the wire connetion

monnan, March 2009

sorry bryn should have read cyl stat not room stat

albob, March 2009

hi bryn sounds like the live feed to the zone valve has been broken check live into room stat and live switch wire out from the stat back to the zone valve . the system you have is an s plan

albob, March 2009

by-pass cylinder stat

dave, March 2009