electric fan slow start

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Home Maintenance and Repairs

Last Post by seymorebutts 11 years ago

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VivaFoxpro

(@vivafoxpro)

Posts: 108

Estimable Member

Re: electric fan slow start

Stuck electric fans are serious fire hazards.

Just...[COLOR="Red"]DRILL IT!

Posted : 01/03/2013 9:51 pm

russman

(@russman)

Posts: 7

Active Member

Re: electric fan slow start

^ Still got old electric fans and working perfectly fine. needs cleaning and proper maintenance.

Posted : 25/03/2013 9:24 pm

balarila

(@balarila)

Posts: 1368

Noble Member

Re: electric fan slow start

Robot yata si Nguyen, Admin.

Posted : 26/03/2013 5:25 am

NothingToDo

(@nothingtodo)

Posts: 45

Eminent Member

Re: electric fan slow start

yupz, cleaning and oiling, especially the bushing in front and on the rear of the shaft - just a bit of oil. but if it gets noisy or what. maybe the bushing has already been worn out due to the rust in the shaft that creates friction. there can be holes or craters, then you have to replace the bushings with new ones.

another reason could be the starter capacitor. if you have a multimeter that has capacitance function. test the reading if its more or less the same reading as the rated capacitance.. mostly they get bloated. then you have to change them if the capacitance reading is far from the one listed. just make sure you get the same ratings - capacitance and voltage, the voltage could be higher - but more expensive.. hehe.. coz if you place a higher capacitance, your fan would turbo charge..haha! it would turn faster than it used to be.

Posted : 01/06/2013 7:31 pm

simplengpinoy

(@simplengpinoy)

Posts: 11

Active Member

Re: electric fan slow start

Normally, a slow start electric fan are caused by 3 things: 1) busted starting capacitor, 2) worn out bushing/rotor shaft, or 3) sticky surface of bushing/rotor shaft due to dust accumulation on the grease and further aggravated by motor over heating.

If bushing/rotor shaft is worn out, the motor tends to vibrate a little bit and slightly difficult to turn, sometimes it even hums. If the shaft rotates after you rock the end of the rotor shaft back and forth (where the fan blade is attached), then it's usually a bushing/rotor problem.

I think your case is more of reason number 3. The shaft seemed to be binded (not turning freely) because its sticking to the bushing and runs more freely after five minutes. Most probably, what happens is that the sticky grease partially dissolves as the motor gets hot thus making the motor run more freely. Try applying WD40 to the bushing/rotor shaft.

Posted : 12/08/2013 5:09 pm