We have the hot water system radiators, and half of them get really hot, and the other half get no heat at all. I’ve tried bleeding all of them and no water comes out of any of them. What could be the problem?
You say no water comes out of any of them – but yet some of them get really hot – sounds a little like a contradiction in terms. In order for radiators to get hot they first must have hot water circulating through them so I am assuming that this is happening on the ones that are getting hot and from that I would be checking firstly for an air-lock or a water flow blockage to the 0thers. While you are at it check that the circulating pump is actually working properly first. Hope this helps.