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Old 07-12-2007, 09:44 AM   #4
FrayAdjacent
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Join Date: Dec 2006
Location: Austin, TX
Posts: 939
The AC system uses a liquid coolant. It works by compressing it (squeezing the heat out of it) and expanding it (absorbing heat). If there's a leak in the system, this liquid leaks out. Over time, even if there are no detectable leaks, an AC system can lose some or most of the coolant.

When the coolant is low enough, the compressor won't even turn on, because there's nothing to compress.

Having the AC system checked for pressure should be something most any auto repair shop can handle.

I'd say take it to a dealer and have them check the system. If there are no leaks, have them evacuate and refill the system.

Alternately, your compressor could be fubar... which probably won't be cheap to replace.
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