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Wobbling Ceiling Fans

Discussion in 'Electrical Engineering' started by Robert B., Sep 7, 2009.

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  1. Robert B.

    Robert B. Guest

    I have a ceiling fan in my masterbedroom that wobbles and shakes when it is
    running and making a rattle noise of what appears to be the fixture chain
    tapping the fixture globe. What might be a suggestion to be done to make
    the fan stop shaking and making such a noise?
  2. Dean Hoffman

    Dean Hoffman Guest

    Have you tried a balancing the fan? There are kits available to do
  3. Rich.

    Rich. Guest

    Run the fan and then take a piece of chalk and slow bring it in toward the
    edge of the moving paddles. As soon as the chalk is hit by a paddle turn the
    fan off. Once the fan stops look for the chalk mark on the paddles. The one
    with the mark will be the heavy side...just in case you end up wanting to
    know this.

    1. First make sure all of the blades are evenly spaced. Most fan motors have
    screw holes to accommodate 4 or 5 paddles. I have seen the wrong holes used,
    making the fan wobble.

    2. Loosen each of the paddle mounting screws 1/2 a turn, pull each paddle
    outward one at a time from center of the fan and retighten the screws.

    3. Try swapping two of the paddles around to see if a difference can be

    4. If all else fails, stop and buy a paddle fan balancing kit. The
    instructions come with the kit.
  4. krw

    krw Guest

    You can also measure the distance from the blade tip to the ceiling to
    find the heavy side. The fan can be gently rotated to measure from
    the same spot in the ceiling (if it's mounted to a beam, for example).
    I guess if it's suspended 6' from the ceiling (like my great room) a
    piece of chalk... ;-)
    A large washer (weight) and a small piece of good double-stick tape
    (stuck to the ceiling side) work too. Put the weight in the middle of
    the high blade top surface. Turn it on again and find the high side
    again. Move the weight out on the blade if this is still the high
    side blade or in if this blade is now the low side. Repeat - rinse.
  5. Dean Hoffman

    Dean Hoffman Guest

    Another trick I read of is to temporarily use clothes pins. Move
    them around on the blades to see where they reduce the inbalance.
    There are some self adhesive wheel weights that might work for the
    actual balancing. Example here:
    I bought some at the local auto parts store some time ago. I thought
    they were considerably cheaper.
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