Hoping someone can help. We have a detached property built around 1997, there are 9 radiators, 3 of which are not heating up. I’ve bled them all, drained the system and removed and flushed one out (upstairs bedroom) lots of black sludgy water. I reattached it and still not working so I’ve replaced it with a brand new radiator, still no joy.
It’s getting water through it (bleeds fine) but no heat at all. Anyone come across anything similar?