I've got an old coventional c/h system. f/e tank and hot water tank are in the loft. after loosing both hot water and central heating i fitted a new pump. now i have loads of hot water but no/very little central heating. i have back filled the system from a hose, and i dont seem to have any air in the system. Possibly the 3 way valve at the hot water tank is no good but i switched it to manual and still nowt.
Any ideas??
Any ideas??