We problems with our CH.
Having checked the system when I put the CH on the rads do not heat up, but if I then also put the HW on by itself the rads do heat up.
When I switch the HW on I can feel a pump near the boiler come on, should this not come on when the CH is switched on also?
We have only moved in a few months and have had little reason to turn the heating on so far.
Thanks for any help.