Welcome to the board Nancy. Most of us have been forced to
replace a compressor from time to time and we're not rich, so it can't
be that expensive to fix.
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Are you sure it's the compressor causing it not to cool or could
it be a wiring or thermostat problem?
Lastly.........what is a Cavalier CGC-D ? Is it a chest cooler? Can
you post a photo?