View single post by dkpd1581
 Posted: Wed Jun 20th, 2007 10:58 pm
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dkpd1581



Joined: Sun Dec 17th, 2006
Location: Atlanta, Georgia USA
Posts: 199
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 Check the capacitor make sure its within 10% of the listed value.  Check to verify that there are no shorts to ground (especially high ohm shorts that can bleed voltage but not trip a breaker).  Is there any other device in the circuit which is bleeding off voltage when the fan is trying to run.  How reliable is the breaker in the panel that serves the fan circuit.

The combination of either one of those problems may cause the internal thermal overload to trip.  Overload switches can, in and of themselves, begin to fail and cause intermittent service.  Make sure that the wire nut connections are tight and look to your wall switch - if there is one in the circuit - and see if it is going bad.

Depending on the type of motor used you can check to see if the winding resistances all add up when the motor has been off for a period of time and is sure to be cooled down (Run to Common ohm value + Start to Common ohm value = Run to Start ohm value) withing 1 or 2 10ths of an ohm. 

It is also possible that the permanently seal bearing is going bad and causing heating of the windings and that in turn is triping the internal overload.

As to the cost of repair/shipping vs a new fan....that depends on the sentimental value you are willing to invest in the old fan.



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