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More than likely it is low on refrigerant and the compressor is kicking off on the low pressure switch. After it is off for a few seconds the low pressure switch resets and starts up again, runs a few seconds and off again. Continuous cycle of off and on.

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Q: Why does a 2003 Saturn Vue air conditioner have a high liquid pressure that pulsates and a low vapor pressure and the compressor clicks off and on?
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