Compressor shot? - http://www.hvacmechanic.com/ Forums
Original message
| jollyguy99
 |  "Compressor shot?"
, posted Wed 20 Aug 21:00  
How can you tell if your compressor is shot? Also what should my ohm reading be on my capacitor?
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Replies:
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| timdecker
| "Re(1):Compressor shot?" , posted Wed 20 Aug 21:24
There are 3 terminals, C=Common, S=Start, and R=Run. The start winding is measured between S & C and the run winding is between R & C. On most compressors there is an internal overload on the C terminal. If you get a continuity reading between S & R but show open between S & C and R & C then the internal overload is open. If the compressor is hot and the overload is open then wait for it to cool down and test again. The overload should be closed if the compressor is cool to the touch. If the overload does not close you can try hitting the compressor to knock it closed else replace the compressor.
Capacitor my be shorted or open, test for rated ohms & microfarads.
Greetings from Houston TX the AC capitol of the world!
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| | beginner
| "Re(2):Compressor shot?" , posted Thu 21 Aug 20:37
Always discharge the capacitor first before testing it!
Value of the capacitor goes by farads not ohms. You use a capacitance meter to measure farads of the cap. You can use an ohm meter to see if the capacitor is charging and discharging. If you were getting low ohms, the capacitor might be leaky. You should disconnect the wires to the terminals during the testing.
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