can anybody help i can get hot water but no central heating?

is your system gravity hot water or pumped, if its is gravity then the pump only runs for your radiators and the impellar may be stuck, some pumps have a large screw in the middle which can be undone allowing you to spin the impellars free, make sure you have some old towels under it as u may get a small dri p from it as you do it

pauly
May 2010

check the three way valve, or two port zone valve is opening.

erj
May 2010