Welcome! Here are the website rules, as well as some tips for using this forum.
Need to contact us? Visit https://heatinghelp.com/contact-us/.
Click here to Find a Contractor in your area.

One radiator not getting warm

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?


  • Jamie Hall
    Jamie Hall Member Posts: 22,877
    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 Member Posts: 11,021
    Did you change your air vents as discussed in your other post?
  • AMW
    AMW Member Posts: 9
    edited November 2019
    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.