The radiators in our flat are warm only at the bottom and there is a trickling sound when the CH is on, so they almost certainly need to be bled. There is a snag, however: on one end they have one connection to the heating system via a Danfoss thermostatic radiator valve (TRV) at the top and a second connection to the heating system at the bottom and that's it: the other end has only screwed-in stoppers top and bottom with *no* bleed valves. Do I have to (partially) dismantle the TRV to bleed the rad? Our flat is in the middle floor of a 3 storey house in Switzerland with a communal CH system. Could it be that bleed valves are only installed in the top floor flat?
Hi gasman0007, Thanks for your answer. I have a sneaking suspicion that there must be some other (easier?) way to do it, since the screwed-in stoppers have been painted over and clearly have not been touched for ages.