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AC System Problems 900 1995

posted by  win960 on  Thu Feb 20 05:26 CST 2003
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My AC compressor cycles. It cycles all the time. Whether it is cold outside or warm. I purchased a gauge for checking the pressure. It reads 25psi when the compressor is not running. Then when the compressor goes on it ramps up to 45 psi in about 5 seconds. Then it stays there for about 5 seconds then the compressor clutch dissengages. Then about 15 seconds later the compressor comes on again and the cycle repeats. The manual that comes with the gauge says that is the proper pressure for a fully charged AC system.

The FAQs say that pin number 1 on plug B should reveal the ECC trouble codes. My plug B does not have a wire connected to pin 1 so I get no codes.

I do not know where to look to troubleshoot this problem. My Chilton's book says see an expert for any AC repairs.

Someone on EBAY sells a kit that has all of the AC pressure sensors for about $30. However, I am sure I have to drain the system to install the sensors. I do not want to do that unless I am sure the sensors are bad.

Can anyone help me on how to diagnose my system problems?





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