Thanks for the replies.
Yes I did bleed the pump by loosening the screw at the front . Some air did come out and then water appeared. I should have mentioned this - sorry.
I'm not sure what or where the divertor valve is ......?
Hello
I am new to this so please excuse me if this subject has already been covered.
I have replaced a radiator with a heated towel rail. To do this, I drained down the heating system from the drain valve on one of the radiators. When I re-filled the system, bled the radiators and turned...