Operation CHARM
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Buick
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1998
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Park Avenue V6-3.8L VIN K
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Repair and Diagnosis
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Heating and Air Conditioning
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Description and Operation
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HVAC Electronic Climate Control
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Refrigeration System
Refrigeration System
The Variable Displacement Orifice Tube (VDOT) is a variable displacement compressor and a fixed expansion tube. This system can match the air conditioning demands under all conditions without cycling.