need help to fix electric fan

[mrel]

Hello
Trying to figure how to fix this electric fan ,I can feel fan housing vibrating but fan not spinning, if I spin fan blade the fan will spin few seconds.
The fan has 3 speed.
I open the back cover of the fan beside the switch there AC Capactor small plastic black box mark 2.5 uf 250 volt.
mrel

 

[MikeMl]

If you spin it by hand with no power applied, does the impeller turn free?

 

[Tony Stewart]

SOunds like a ceiling fan and your starter cap is worn with high ESR.

Buy another (cheap) . THese are plastic film motor start caps.

https://www.amazon.com/Tech-Ceiling-Capacitor-1-5uf-2-5uf/dp/B007XQOG1I

 

[KeepItSimpleStupid]

This https://www.hurontel.on.ca/~taitg/pages/cfan.html diagram might help a bit. I'm with everyone else, the capacitor. It only has two leads, right?

Here's https://ceilingfanparts.com/images/capacitor2.htm another source I've used.

I also agree with the check for very easy rotation by hand to see if the bearings need cleaning/greasing. If your in the US, I might be able to send you a small quantity of some really nice grease if you need it.

 

[MaxHeadRoom78]

If the bearings are sintered bronze Oilite sleeve type, I would not use grease, these bearings are porous and if still good, unworn, wash them with Kerosene and soak them overnight in light oil.
Max.

 

[KeepItSimpleStupid]

Normally, I would agree, but the stuff I have is light, synhetic, high temperature, non-hydroscopic and expensive. I actually used it
to pack a bearing assembly with 2 oilite bearings within a 1"x2.5"x2.5" space in a gas dryer. 48 YO NOS assembly looked like it was packed with sawdust. I put a brass tipped set screw on the drive pulley which should act as a mechanical fuse. The OEM used grase and Oilite and it lasted 47 years. I wish I knew about the assembly sooner, so it could be part of the PM. The shaft temperature runs at 110 deg. F.

 

[dr pepper]

Does the fan have a capacitor, if so it could have failed, and this would cause the symptoms you have described.