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96 DeVille Concours and 16yr old son has 95 DeVille
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Discussion Starter #1
On my 96 Concours the A/c has always worked fine I've had it on a few times this season already. Had it one day ant the next day I turned it on it was blowing so hot I'm sure the polar ice caps melted some. The temp at the time was 79degrees and the A/C was set on 60. This is actually the first problem I've ever had with this car so I can't be to upset with her. Any help would be greatly appreciated.
 

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2002.5 F55 CORSA STS, 2014 Explorer XLT FWD
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69,483 Posts
Re: 96 DeVille Concours

Read the sticky thread named "How to pull codes" at the top of the main deVille page. You need to link to the OBD-I code list. It's all built into the car. That's the place to start.
 

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1998 DeVille / 173,000 miles
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121 Posts
Re: 96 DeVille Concours

My DeVille stopped working all of the sudden. One day ice cold then nothing. Turned out to be a bad wire going to the compressor, had to get at it from under the car. My mechanic had a spare laying around and charged me $20.00 to fix it.
 

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96 Concours, 90 Deville
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112 Posts
Re: 96 DeVille Concours

ViceCop, what codes did you pull? I got an AC1347 (chart says "B" instead of "AC") on my 96 which is very low refrigerant. In my case, the system just needed a recharge. Since you also have a 96 Concours, I've posted the same info that I did in another thread about recommended settings in the 96 Deville/Concours.

http://myweb.accessus.net/~090/dtcobd2b.html#bod
B1344 - HeaterDefrost/AC Door Movement Fault
B1347 - Very Low A/C Refrigerant Warning
B1348 - Very Low A/C Refrigerant Pressure


I ran across this thread but I had an AC1347 code (low refrigerant) and my compressor was cycling very quickly on/off/on/off. Anyway, I found a great basic page about how A/C systems work that described my problem exactly. Great page for general A/C info - http://www.aircondition.com/tech/que...ith-Gauges-FAQ.

About 20 oz of R134a and my 96 Deville is blowing cold air again (and the wife is happy!). I don't think we realized it, but the A/C temp hasn't been as cold the last couple summers. After 13 years of service, the car deserves an A/C charge. For my 96, the factory service manual says the low side(and high side) pressures should be as follows. (you can test low-side with a cheap A/C recharge kit where the gauge is attached directly to the bottle.)

Ambient Temp & % Humidity - Low Side PSI - High Side PSI
70 F @ <50% Humidity - 25 to 35 PSI - 155 to 185 PSI
70 F @ >50% - 35 to 45 PSI - 195 to 225 PSI
80 F @ <50% - 35 to 45 - 230 to 260
80 F @ >50% - 45 to 55 - 265 to 295
90 F @ <40% - 42 to 52 - 270 to 300
90 F @ >40% - 55 to 65 - 310 to 340
100 @ <20% - 52 to 62 - 310 to 350
100 @ >20% - 70 to 85 - 380 to 420
110 @ "Moderate Humidity" - 60 to 80 - 360 to 400
120 @ "Moderate Humidity" - 65 to 85 - 380 to 420
 

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96 DeVille Concours and 16yr old son has 95 DeVille
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47 Posts
Discussion Starter #6
AC1340 code question

I know these code questions have been asked a hundred times on here. I have looked but cannot find the answer on here. Can anyone tell me what the AC1340 code is? I am having an A/C problem on a '96 Concours. Thank you.
 

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96 DeVille Concours and 16yr old son has 95 DeVille
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47 Posts
Discussion Starter #8
Ok I will check it out, thanks again for all your help everyone.
 
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