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One radiator not getting warm

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AMW
AMW Member Posts: 9
edited November 2019 in Radiant Heating
I have steam heat. All of my radiators are working fine, except one is not getting warm at all, not even at the bottom. The knob is turned all the way to "open", and air does hiss out of the air vent a little when the boiler goes on. Two weeks ago the radiator was working.

Any ideas?

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  • Jamie Hall
    Jamie Hall Member Posts: 23,283
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    First question would be... what changed between two weeks ago which it was working and now? Since there are no moving parts other than the vent and the valve... a sudden change on its own is unlikely. Not impossible, but unlikely.

    However, while you are thinking about that, does the pipe leading to the radiator get warm? Can you trace the pipe below, to see where it stops getting warm?
    Br. Jamie, osb
    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England
  • JUGHNE
    JUGHNE Member Posts: 11,061
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    Did you change your air vents as discussed in your other post?
  • AMW
    AMW Member Posts: 9
    edited November 2019
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    The pipe isn't warm right before it goes into the radiator. Then it goes down through the walls so I can't trace it. Nothing has changed, and I haven't replaced the air vents yet.

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