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Old 07-29-2010, 07:19 AM   #1
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How can i check a capacitor with a meter


The other day I replaced a condenser fan motor and all that was wrong with the unit was the capacitor. How can I check the cap with my meter to check if it's good or not.

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Old 07-29-2010, 08:46 AM   #2
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How can i check a capacitor with a meter


if your meter measures capacitance, that would be the easiest way. if not, discharge the capacitor and measure the resistance across it. the resistance should start out at 0 and go to infinity (usually 1 on the scale).

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Old 07-29-2010, 10:23 AM   #3
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How can i check a capacitor with a meter


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Originally Posted by Dennis Diaz View Post
How can I check the cap with my meter to check if it's good or not.
Method 1 uses a 1.1 megohm resistor from Radio Shack and a 9 v battery. And a clock!

Method 2, you need a doorbell transformer.

Method 3 uses a 4 W 120v incand. bulb and most nearly duplicates real world conditions.

What is the marked capacitance value in uF? What meter do you have?

Method 4 uses a cheapie analog ohmmeter and a clock.

Last edited by Yoyizit; 07-29-2010 at 10:59 AM.
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