Question about 1998 Cadillac DeVille

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1998 cadillac deville still reads service ac system

The ac compressor is new and is not kicking in, The system has been recharged, All fuses have been checked and are good. The computer has been reset, and still reads on the dash service ac system. Can anyone pls give some advise as to what I may need to check.

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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

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

Posted on Jan 07, 2009

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1 Answer

WHER IS AC RELAY ON 98 CADILLAC DEVILLE


A/C Compressor Relay In engine compartment fuse/relay center.--------- There is also a fuse.Check the AC fuse 10amp in fuse/relay center.------- Both located under hood, in the engine compartment.-------- For the diagram of fuse and relay, click the link below:--- http://technoanswers.blogspot.com/2011/07/ac-compressor-relay-and-fuse-diagram.html --------- This should help.Thanks.Helpmech. .

Jul 12, 2011 | 1998 Cadillac DeVille

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On the dashboard of my 99 deville it says a/c off low refrigerant. how do I turn the ac back on to recharge ? thank you ...


You will need to recharge it to get it to come back on, it has a pressure switch that will prevent operation until the level is brought back up to normal.

Jun 26, 2011 | 1999 Cadillac DeVille

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Warning light says Low Refrigerent-AC/Off. I tried to recharge the system but the Compressor won't engage, How do I get the Compressor to come on so as I can recharge the system. Is it a pressure swithch...


in order to recharge the ac you first must clear the trouble code for the ac off warning. when you get this warning the computer shuts down the compressor to keep it from running without the lubricant that is in the freon. clear the trouble code and the compressor will run and you can recharge the ac.

Jan 05, 2011 | 1998 Cadillac DeVille

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Ac system


it probobly is down on pressure and needs to be refilled thats why it wont lock in the compressor the pressure switch wont let it

Apr 02, 2010 | 1998 Cadillac DeVille

1 Answer

My ac wont work


Must be Air-Condition System Lines/ Hoses leaking R12 Freon (gas).

MAYBE THE PULLY HUB BEARINGS FAILED OR
DUE TO VERY LOW R12 FREON (GAS ) will not work.
Because there is a switch in the receiver/dryer prevent AC from working when low R12 Freon present, to protect the system & compressor damages.

You must fix the leaks, before recharging it.

They must **** the old (residue) gases from the system & lines / hoses...... & stay in the vacuum pump 30 minutes to proof no more leaks.

Recharge some oil for the old type R12 Freon gas.

Before recharge it to 62-67 psi R12 Freon

See the web site like www.youtube.com/video site to see How they service & repair air-condition system?
Put the question to their search window.

This is the question u should.
How they service & repair air-condition system?


Regards;
MAR

Aug 04, 2009 | 1994 Cadillac DeVille

1 Answer

AC compressor blows fuses when it goes to kick on.


As a mechanic I NEVER put that JUNK in ANY system, they clog up A/C compressor's and every thing elese. (You might have to replace most of the components in your vehicle now. ie condenser, evaporator, compressor, receiver/dryer (accumulator), orifice tube (thermo expansion valve) and you may be able to flush out the lines.

Apr 27, 2009 | 1994 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

A/C Compressor is shot


generally speaking if the a/c clutch doesn't kick in it's because of either no voltage or low refrigerant. you can waste the money and just recharge the system and replace the a/c clutch, however it's been my expeirience that often times the compressor goes bad and that money was needlessly spent. this time of year the price to fix the system is far cheaper than the begining of the spring take the vehicle to a qualified a/c tech and your problem will cease. if you have no voltage that means the a/c clutch relay is bad. make sure all relays and fuses are good. the relays are clearly marked. quick to find out is to switch the cooling fan relay with the clutch relay if the a/c kicks in you know that relay was bad. hope this helps

Jul 08, 2008 | 1998 Cadillac DeVille

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