Posted by George Marsh on September 12, 2012 at 22:12:48 from (50.104.213.108):
In Reply to: Motor blowing cap posted by Slowpoke on September 12, 2012 at 21:18:30:
What is the MFD? If the cap going up in smoke is a start cap, start caps must be removed from the start windings within a fraction of a second by a switch inside the motor or it will go up in smoke. If there is no end switch, then capacitor must be a run capacitor. Run capacitors ususally are in the 5-35 MFD range. If you replaced it with the right MFD and voltage, then either you got a bad capacitor or something is wrong with motor.
Without looking at motor, it's hard to say what you have. I would try removing cap manually after motor starts and see what happens. I would be leaning towards saying you have a start cap that isn't being removed from circuit. Is it possible you have an electronic switch inside the motor that has replaced the end switch and it's bad?
Usually if smoke leaves an electric device, it's time to get a new one.
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