Refrigerator Grounded Compressor Testing

Scrape the copper suction line on the compressor so it shines. This can be done with a knife blade or a piece of sand cloth. Place one probe on the clean copper surface, and the other one on a compressor terminal. Check each one by moving the probe to each terminal. If there is no deflection on the meter, the compressor is not grounded. If you have a reading, the compressor is bad and you need not check any further. The three terminals are electrically connected internally.

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