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  1. #1
    Join Date
    Nov 2019
    Posts
    2
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    Weird Thermostat looking dial

    I have this weird thermostat looking dial on what seems to be my return duct.

    Not sure what it is.

    I have a central air unit that cools very well in the summer time but the air upstairs is cool in the winter. I'm wondering if this is some sort of damper.

  2. #2
    Join Date
    Jun 2014
    Location
    Dover, DE
    Posts
    11,531
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    Don’t see a photo.
    But it could be a humidifier.
    I havent failed. Ive just found 10,000 ways that wont work. - Thomas Edison

    Its not whether you get knocked down, its whether you get up. - Vince Lombardi

    "In this house we obey the laws of thermodynamics" - Homer Simpson

    Local 486 Instructor & Service Technician

  3. #3
    Join Date
    Nov 2019
    Posts
    2
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    Thread Starter
    Name:  IMG_20191117_142259.jpg
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    don't know why they are sideways...

  4. #4
    Join Date
    Jun 2014
    Location
    Dover, DE
    Posts
    11,531
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    Humidistat for a whole house humidifier.
    I havent failed. Ive just found 10,000 ways that wont work. - Thomas Edison

    Its not whether you get knocked down, its whether you get up. - Vince Lombardi

    "In this house we obey the laws of thermodynamics" - Homer Simpson

    Local 486 Instructor & Service Technician

  5. #5
    Join Date
    Jun 2012
    Location
    Northern NV
    Posts
    1,902
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    OLD humidistat... 40 years or so?
    A dying culture invariably exhibits personal rudeness. Bad manners. Lack of consideration for others in minor matters. A loss of politeness, of gentle manners, is more significant than is a riot.
    ― Robert A. Heinlein

  6. #6
    Join Date
    Apr 2003
    Location
    Maple Grove, MN
    Posts
    3,188
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    Them things work off of a piece of horse hair that's inside of them.

    When it gets too dry the horse hair curls up or something and makes the humidifier turn on.

    I love old school engineering!


  7. #7
    Join Date
    Sep 2007
    Location
    edmonds wa
    Posts
    4,328
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    Probably covered in lint now.
    UA Local 32

  8. #8
    Join Date
    Apr 2003
    Location
    Maple Grove, MN
    Posts
    3,188
    Post Likes
    Quote Originally Posted by buford View Post
    Probably covered in lint now.

    Horse hair doesn't care!

  9. #9
    Join Date
    Dec 2002
    Location
    in a house, Appomattox, Va.
    Posts
    4,721
    Post Likes
    It may have connected to a "funk rotisserie" type humidifier. the foam wheel basting in nasty juices in the pan, and a nice window in the cover to watch the show.
    Col 3:23


    questions asked, answers received, ignorance abated

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