Question about 1998 Cadillac DeVille

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How to reset AC on 1998 Cadillac Deville after servicing.

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  • Aki Aug 25, 2010

    What do you mean RESET?? there is no need to reset once you service the AC system

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  • 1,403 Answers

You can reset the computer by disconnecting the positive cable on your battery for 5mins. only be sure that your radio does not have to be recoded afterwards. refer to owners manual. resetting your computer will reset all codes even if your check engine light is on,,but depending what's wrong it will not repair everything! i hope this helps!

Posted on Aug 25, 2010

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Posted on Jan 02, 2017

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  • 109 Answers

SOURCE: 1998 cadillac deville

try taking off your fuse panel cover, there should be a reset button in there.

Posted on May 06, 2009

  • 255 Answers

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

m036_094
  • 107 Answers

SOURCE: 1998 cadillac deville still reads service ac system

Sounds like you have a problem with the pressure switches on the ac system. Find the aluminum lines for the ac, attached to the lines are two pressure switches plugged in to the car wiring harness. Make sure the sensors are tight into the fittings on the lines. If they are unplug them one at a time and bridge the two terminals in the plug going to the car's harness not the switch, with a jumper wire or cotter pin which ever wire turns on the ac compressor remove that switch and take it in to the auto parts store and get another one.

hope this helps you out

Posted on Jan 07, 2009

  • 173 Answers

SOURCE: my cadillac deville 1998 was blowin good ac on the

actuator is not working the top vents. the actuator opens and closes flaps like a door

Posted on Apr 03, 2010

  • 1 Answer

SOURCE: 1998 Cadillac Deville low refrigerant a/c

I have a 1999 Cadillic Deville. The low Frefrigerant indicater come on after about 15 minutes of disconnecting the battery power. Each Time I reset the power the air conditioner comes back on for a while then goes out. I have taken it into the local auto repair place and they find no problem with the unit.
Could this be a intermittent connection to the computer. They have replaced both sencors and the problem persists. Where is the computer located on the car that handles this AC sensor message?

Posted on Jul 14, 2010

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I have a 1999 Cadillic Deville. The low Frefrigerant indicater come on after about 15 minutes of disconnecting the battery power. Each Time I reset the power the air conditioner comes back on for a while then goes out. I have taken it into the local auto repair place and they find no problem with the unit.
Could this be a intermittent connection to the computer. They have replaced both sencors and the problem persists. Where is the computer located on the car that handles this AC sensor message?

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Did the 1998 come without A/C from the factory?


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Nov 18, 2009 | 1998 Cadillac DeVille

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AC BLOWER MOTOR GETS HOT THEN TURN OFF.


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Jul 04, 2009 | 1999 Cadillac DeVille

1 Answer

1998 cadillac deville


try taking off your fuse panel cover, there should be a reset button in there.

May 06, 2009 | 1998 Cadillac DeVille

2 Answers

1998 cadillac deville still reads service ac system


Check the wire connectors and wires for any breaks that are on the A/C line.

Jan 07, 2009 | 1998 Cadillac DeVille

1 Answer

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

Jan 04, 2009 | 1998 Cadillac DeVille

1 Answer

Auto theft system


never seen a deville so cant help,but it sounds like a relay is not being controled by the ECU and to locate this fault need special software and again to reset vehicle .sorry i couldnt tell you more know the fault but without dealer software ??i could only rewire to make it work

Dec 13, 2008 | 1998 Cadillac DeVille

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