Hi, I posted a query on this subject a couple of weeks ago about injecting sludge remover into the radiators which I have now done & also put a rad valve with a drain off in place of the existing one. I turned the heating back on and bled the radiators but only the upstairs ones are getting warm - the others are stone cold. I've opened the valves up again (flow & return) so I'm stumped as to what has gone wrong. Any ideas?
Cheers
Neil
Cheers
Neil