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Fan motor slow on a/c

The fan motor on my window air conditioner starts out at what seems to be about the right speed for high but varies and slows with time. It does not matter whether the compressor is running or not as whether the fan slows. The fan motor gets hot however the wires leading to the motor do not get warm.

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  • jonnieac May 23, 2008

    THe motor is drawing the correct amps. The a/c unit has only about 5 months use on it. The motor becomes too hot to touch but does not draw any more amps. The bearings are very smooth.

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1 Answer

If the fan motor has a capicator it could be bad. A bad cap will pull the motor down. If there is no cap then the motor beatings could be going bad. this can be checked by matching the motor amps with the rated amps on the unit information tag.

Posted on May 18, 2008

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Do you know of a way to slow down the LOW speed fan setting on a Kelvinator KSE70HRA air conditioner? Low is very noisy and blows air like a HIGH setting.


Hi, no, im sorry if it is on low already, it can't be changed to go any lower. The only thing I can come up with is the fan motored is wired wrong, and they have the high or med lead connected to the low speed, as it should run slow. On a central air system, there is a board that is in the indoor unit that shows the fan speeds, and they can be changed.I didnt look up your unit, and if it is a central air and not a window unit, you can change the speeds at the board. The wires are colored, blue is normally low, red is Hi, and blk or yellow is med. If this is a window unit, there is nothing much you can do. If you know anything about electrical, and you have a 3 speed fan, pull the cover to get to the switch back, and see what leads the have terminated to the switch. They may have it miswired. I wish you the best of luck,
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Fan motor slow on a/c


If it is making a continuous noise, and your air conditioner is still not cooling at all, there may be a serious problem with one or more of these areas:

  • Compressor
  • Condenser
  • Evaporator

  • OR

    This could the problem the with short circuit or defective component you need to check :
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  • Overload and/or relay
  • Thermostat (Open thermostat)
  • Burnt wiring
  • Bad selector switch
  • Capacitor

  • Good luck....

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    Fan Stops blowing air


    Isthis a window unit? It sounds like it. There could be a problem with your fan switch or the fan motor itself? Multi-speed motors can lose one speed at a time. It really sounds like the fan motor is bad. If the compressor starts in the cool mode, and the fan doesn't, the fan motor could be locked up. See, if you can spin the motor by hand? If you can, then something is bad within the motor. Now, if the motor has a capacitor, check for a loose or burned wire. Good luck.

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