I have a hot water (or steam?) radiator that leaks water unless it's completely open or closed.
The side has a valve that can be turned to open or shut the connecting pipe. The other side has a steam vent.
If I fully open the valve, everything works properly, but it gives off way too much heat.
If I open the valve just a tiny bit, it's still too hot, but bearable. However, it will leak from the steam vent (enough to pool up before it can evaporate).
I told the super of my apartment about it, hoping it could be fixed, but he said just to leave it wide open or shut it off.
I've determined I have a single pipe, steam radiator, with a steam vent on the side opposite the heat pipe.
I read bleeding could help, but my radiator does not have a bleed valve, so I turned it off and removed the steam vent instead.
Some water seeped out. Then I turned it on, and lots of water shot out. Convinced this was a steam radiator, I let this continue until it seemed less like warm water and more like scalding hot steam instantly turning to water. When that happened I turn it off.
About two and a half jars worth of water shot out. Quarter for scale.
I then replaced steam valve and turned the radiator back on, and I'm now waiting to see if it will still leak.
However, this did not help at all.