Found the valve its 3 way and adjusted switch on side from auto to manual and its done the trick. Now i know where it is i will keep assesing the valve until it packs up all together, all rads fine Many thanks kevplumb :D
I have a vaillant VU182/1E combi boiler and i put my central heating on for the first time since march this year but not one of the rads have warmed up, they are all turned on and have been bled but nothing. I have done the preliminary checks according to the manual and fault finding procedure...