Diagnosing a fan motor problem


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Old 05-15-20, 09:43 PM
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Diagnosing a fan motor problem

hello

I have a basic household pedestal fan by hunter
the fan is not working, when I plug it in Sometimes the motor hums other times not, but in either case blades do not spin.
is this something that might be A reasonable fix or is it likely the motor is shot and not worth repairing?

thanks
 
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Old 05-15-20, 09:55 PM
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If it's a newer fan it may have a defective run/speed capacitor in it. Some use one.... some don't.
If it's an older fan it could be the same problem or dry/worn bearings.

Put it on hi speed and try pushing the blades with a pencil.
If the blades feel tight.... it's most likely a bearing issue.
If you could get to the bearings a little 3in1 oil could be put on them.

When all else fails.... put it at the curb with a sign on it.... $25.
 
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Old 05-16-20, 01:33 AM
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Also do the fan blades spin easily when the unit is off?
 
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Old 05-16-20, 06:26 AM
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The first test is to spin the blades when it is off. If they don't spin then the bushing are gummed up. You can take the ends off the fan and oil them with sewing machine oil.
 
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Old 05-21-20, 12:46 PM
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Thanks for all the tips
I diagnosed the electrical problem it ended up being a faulty plug
but over the inactivity period the bearings have now gummed up so I will treat as advised
must the oil be specific or will something like WD-40 or basic household oil also do the trick?

I learned a lot from this exercise
as mentioned I see a faulty capacitor is very common Along with thermo-couple issues.
while it may not be my issue in this particular case I did some research but still find it a bit tricky to check/ test the capacitor.
Does anyone have an outline for the basic straight forward steps to test the capacitor?
 
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Old 05-21-20, 02:35 PM
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WD40 is not really an oil. It is more of a cleaner. You could start with that to loosen it up. Then add a couple of drops of light #20 oil like sewing machine oil.
 
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Old 05-21-20, 08:32 PM
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basic straight forward steps to test the capacitor ?
The easiest way is to get a multimeter that has a capacitor check setting.
 
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Old 05-22-20, 05:36 PM
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the bearings have now gummed up so I will treat as advised
must the oil be specific or will something like WD-40 or basic household oil also do the trick?
DO NOT use traditional 3 in 1 Oil or WD 40 on any type of motor bearing, the solvent will destroy the bearings in short order. 3 in 1 does make a product for electric motor bearings though, it's the product in the blue can. Most Lowes stores stock it.

https://www.lowes.com/pd/3-IN-ONE-3-...ricant/1210103

 
 

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