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Thread: Ceiling fan runs slow on highest setting

  1. #16
    Jack of all trades DonL's Avatar
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    Josh,

    I would compare the one that works with the one that runs slow. If you can.

    Sounds like you made some progress.

    Check the value of the run Capacitor why you are Looking, It could be different. That could cause a different speed.

    Good Luck on Your project.

    Have a Great day.

    DonL
    Theory only works perfect in a vacuum.

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  2. #17
    DIY Junior Member mylomine's Avatar
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    Hey there DonL,

    I took the fan down today and it appears to be wired correctly. Check the voltage and it is coming in at 120. So we are good there. So this leads me to believe that the capacitor may be the culprit now. Only problem is I'm not which one is the capacitor. There are two back box things connected to the fan chain. I am attaching a picture. Now when I figure out what size it is do I get the same size or get a bigger one? I have not checked the other fans yet because I don't know what to look at. Thanks for you help again.

  3. #18
    Moderator & Master Plumber hj's Avatar
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    You could have it wired in series with something else and still get 120 volts to it. It would really be stretching our credulity to have had more than one fan with the same assembly problem, and you get all of them.
    Last edited by hj; 05-09-2011 at 06:09 AM.

  4. #19
    DIY Junior Member mylomine's Avatar
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    Could that cause the fan to receive less power? This addition to the house was not done very well. When I pulled the fan off yesterday there were a lot of wires in ceiling. There is one red and white coming out for the fan. Then there are about 5 white that are all touching each other with a wire twist thing and 5 black touching each other with a wire twist. Then there is one white and back together with a wire twist. Very weird.

  5. #20
    Retired Defense Industry Engineer jadnashua's Avatar
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    Red, when done correctly, indicates a switched lead. Depending on the meter you have, you can read 120vac, and not really have a decent connection. If it is messed up, once you actually put a load on it (the meter is essentially a non-load at many Megaohms), the voltage would drop.

    Are the two switches configured as 3-way (i.e., you can turn it on or off from either location), or in parallel (you can turn it on from either, but not turn it off unless both are off). If neither of these situations are what you have, then it is wired wrong.

    With 5-wires in one wire nut, it is very easy to have one or more that are not making a good connection - you could have the situation where you'd get voltage indication on a digital multimeter, but the connection is so slight, it would not support much of any current.
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

  6. #21
    Jack of all trades DonL's Avatar
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    It looks like that fan motor may use three or four caps.

    The box with the five wires, Will most likely have 3 or 4 caps in it.

    It may have the rating printed on the side.

    The larger the value the faster the speed.

    This may help, Just for reference; http://www.eceilingfans.com/capacito...ling_fans.html

    Could probably find them cheaper elsewhere.


    DonL
    Last edited by DonL; 05-09-2011 at 08:24 AM. Reason: Short between headset
    Theory only works perfect in a vacuum.

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  7. #22
    DIY Junior Member mylomine's Avatar
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    It is wired in a 3-way.

  8. #23
    DIY Junior Member mylomine's Avatar
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    Ok, I will take a look at that and compare it to the other fans to see if they are the same or not. Either way I think I will replace it and see if we can get this thing moving faster.


    Quote Originally Posted by DonL View Post
    It looks like that fan motor may use three or four caps.

    The box with the five wires, Will most likely have 3 or 4 caps in it.

    It may have the rating printed on the side.

    The larger the value the faster the speed.

    This may help, Just for reference; http://www.eceilingfans.com/capacito...ling_fans.html

    Could probably find them cheaper elsewhere.


    DonL

  9. #24
    Electrical Contractor/Instructor jwelectric's Avatar
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    Quote Originally Posted by mylomine View Post
    There are two wall switches in this room. One of them is a lighted switch so that you can see it in the dark when the switch is in the off position.
    Quote Originally Posted by hj View Post
    You could have it wired in series with something else and still get 120 volts to it. It would really be stretching our credulity to have had more than one fan with the same assembly problem, and you get all of them.
    Quote Originally Posted by mylomine View Post
    It is wired in a 3-way.
    As has been recommended, wire it straight up and use the pull chain to see if that cures the problem. If it does then the problem is the lighted switch
    Last edited by jwelectric; 05-09-2011 at 10:29 AM.

  10. #25
    General Engineering Contractor ballvalve's Avatar
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    The cost of a Chinese fan is about that of 5 gallons of gas today. A new fan might be cheaper and faster.

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