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Working in 1948 era monoflow system with Crane cast iron baseboard. I have an L shaped section that is about 12x14 that won't heat on the return end. Naturally, it is the highest section most distant from the boiler, second floor above basement. It appears to have all the air out of it. Anyone have any ideas or hints? I am guessing it is a flow issue not air entrapment problem. I have always been able to get it going in the past but not without lots of fiddling and cussing.
It had to be drained because I just replaced all near boiler piping.
All other radiators and baseboard bled out just fine. BTW, should you bleed from the closest radiator to the farthermost or vise versa? Local "experts" do not agree. I always, in the past, bled the closest first.
Any suggestions would be greatly appreciated.