Question about 1994 Cadillac DeVille

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My dash says that my ac compressor is off. How do

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  • Cadillac Master
  • 6,826 Answers

If you want to charge the system and the system was low on freon, it may have automatically shut the compressor down.

Sometimes, the computer will do this as a safety measure, and it must be reset.

On my 1990 Deville, resetting the computer is as easy as disconnecting the battery for a few minutes and reconnecting and making sure that as soon as your a/c compressor starts cycling to add some refrigerant, about .5 lbs. at least.

Otherwise, the compressor will not get current from the computer's relay.

Posted on Jul 03, 2010

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Posted on Jan 02, 2017

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SOURCE: i have cadillac deville 1991. need new gas ac

the shop is trying to sell something not needed. i have done many change overs without changing anything but refrigerent ant adding they oil supplied in the 35$ change over kit offered everywere.some have many years and miles on them and are ok.the arguement the shops will give are well sir, your compressor will go out.not, and if it did so what change it when it broke. the orings will leak.not my first change over kit job was in 1999 and the a/c still works fine. so get the r12 to 134a kit at walmart it will work unless it dont work now wich would mean it leaked out or some other failure. if so fix leaks/repair system then recharge

Posted on Jun 18, 2010

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SOURCE: 1998 cadillac deville reads service ac system

Hi,check if the compressor clutch is engaging,if not check the conection at the compressor if ok check,fuse ,or relay ,if those are fine and the commpressor is engaging,check freon presure ,may be too high or low, if this is the case ,correct the problem and disconect the negative cable from the battery for a minute to reprogram the sistem..C1

Posted on Jan 04, 2009

honeymokey
  • 3113 Answers

SOURCE: A.C compressor reads off on my dash. Also I

If it builds up too much pressure in the system it will shut off compressor. May be an AC pressure switch problem if compressor does not even come on.

Posted on Jul 02, 2009

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