Question about 1995 Cadillac DeVille

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My cadillac concours deville say low refrigerant ac compressor off and tried to put some in is there a certain way to do it

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Yes, if it is like my 1990 cadillac deville, you must first disconnect the battery for 3 or so minutes and reconnect it to clear the error message and to reset the a/c system so it will turn on when R134a is added under pressure.

Cadillac did that in 1990 so the compressor would not run without refrigerant in the system. It's a safety feature designed to save a compressor if there is a leak in the system.

If you try to add refrigerant without resetting the a/c system, then the compressor will not engage.
.

Posted on Jul 02, 2010

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