Reply by EEngineer

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Posted on Do I need a new start capacitor?

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1110 posts in 3643 days

#1 posted 11-06-2012 06:56 PM

so I am thinking maybe the capacitor is not holding a charge
are wired to give a large inrush of one half of an AC sine wave voltage over and over to get the rotor moving
Each attempt slowly charges the capacitor?

No, no, no! I refer you to wikipedia for an accurate but brief description of what the cap is for.

Troubleshooting: you can disconnect the belt, turn on the power and if the motor starts with a quick twist of the motor pulley in the right direction, bet on a bad cap.

If the motor is having problems when it is cold, I would be more inclined to look at the bearings. Interfernces all get tighter when cold. However, I wouldn’t rule out a bad cap.

-- "Find out what you cannot do and then go do it!"

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