So sorry for the next question - should I keep turn everything off before doing this? I turned my boiler off at the mains when I realised I had a problem
Thanks
morning,
I fired up my central heating on Sunday and bled 2 radiators ( they both hissed but no water came out) all the others were roasting hot and now I have no hot water. I can see the pressure has dropped on the expansion (?) tank to zero but I don't know how to get it back up and even if...