hmmm
ok
i do have a 3 port valve but it seems to work (i mean move across) as the heating comes on, and the hot water comes on (rest position this is i believe).
the cylinder stat? how would that cause this problem though....
the programmer also seems to be fine as we get them...
I don't know if anyone can help me, who may have come across this problem before?
This started to happen about a month ago:
i have a gloworn boiler and my system is open, i have 2 tanks in the loft space.
i can get heating ok and hot water ok, but when both are on together i only get...