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Apartment Radiator Help!!!
Sorry this is long but i want to give a detailed description....I live in the northeast where it has been extemely cold lately, so I decided to turn on my heat for the first time in the 2 years I have lived here. I live in a small apartment in a 4 story building and my apartment has steam (i think) radiators. The radiator has one long pipe on the side. At the top of the pipe is a black knob that says open/close. I turned the knob to open to turn on the heat. When it started to get too hot I closed it. Everything was fine. The next night i went to open it again and I must have either opened it too far or the nut thing below the knob came loose because the whole knob shot off and steam shot up in the air like a fire hose. It scared the crap out of me. I quickly screwed the knob back on and kept it closed. It was fine the whole night. Now today all of the sudden the radiator started hissing and steam was coming out. I figured I must not have closed it all the way so I tried to turn it closed and it just spun around, didnt tighten or anything. I literally had to hold the knob down because i was afraid if i let go the whole thing was going to blow off again. I realized that the nut below the knob was loose so i tightened it as far as it would go which then allowed me to close the knob tightly. However, now it keeps hissing off and on. It will hiss for a few minutes and then stop, and then start up again. No steam is coming out and everything is as tight as it will go (I dont have a wrench so i used my hands) but it sounds like their is still air leaking out from around the nut beneath the knob. I live by myself and I am completely clueless about radiators. Is this hissing/whistling dangerous? can it explode? lol. I dont know what to do because its sunday and maintenance wont be able to come look at it today. Any suggestions??? Should I try opening the knob and letting some air/steam out and then closing it again? Any help would be greatly appreciated.