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Old 12-07-2009, 09:46 PM   #4
fdryer
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Join Date: Jan 2006
Location: NYC
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2003 L-Series 3.0L Sedan
Default Re: 1994 sw1 a/c not working, hasnt worked all year

When you jumpered the compressor directly to 12v and had the compressor running, you didn't say whether or not that cooling occurred. You also stated that there's plenty of R134a and pressure. If so what was the pressure and at which service fitting? I presume there wasn't any cooling occurring and unless you're familiar with a/c system pressures, what you read isn't sufficient to operate the system; the low pressure switch most likely detected too low a pressure and simply disabled the compressor circuit from allowing the compressor to run. Refrigerant moves lubrication oil and loss of refrigerant also means loss of adequate lubrication. No refrigerant to circulate oil means no oil to the compressor; continuing to run a compressor with lost refrigerant will ruin the compressor from lack of oil lubrication. All you did was confirm that the compressor clutch coil works, that's all. Find the leak that caused the loss of refrigerant, repair/replace damaged parts, evacuate the system of all air and moisture, test for any further leaks and then refill with R134a and any make up oil.

Here's a primer on what to look for; http://www.saturnfans.com/forums/showthread.php?t=80107
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