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Discussion Starter #1
On a 2000 Seville STS,

What could be wrong if only the passenger side A/C blows cold?

It feels like the driver's side is blowing outside air, at best.

TIA!
 

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White Diamond '03 DHS (with DTS floor shift)
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A common cause is low refrigerant on a dual zone system (not quite low enough to set a low refrigerant DTC).
 

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92 Eldorado 95 Cadillac SLS 99 Cadillac SLS 2004 SRX
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The previous owner said that he just had the AC system recharged.....
Right, but like Ranger said it now needs a recharge or you might have a leak. I would get a dye kit to test it and make sure. Confirm with the previous owner how long ago that was. He probably used it up.
 

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White Diamond '03 DHS (with DTS floor shift)
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If it is not leaking, then one of your air mix doors is not closing completely. My '97 did that on occasion. I could always cure it by running the temp up to 90 and then back down. If that doesn't work, then you'll have to check the doors and actuators.
 

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2000 Seville STS
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I have the same problem with my 00 STS. I'll try the temp thing first and also check the refrigerent. The air is cold on the passanger side, is it possible to have a leak and only be warm on one side?
 

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White Diamond '03 DHS (with DTS floor shift)
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Only till the refrigerant gets low enough that neither side cools. By that time you would likely get the service refrigerant message and a low refrigerant DTC would be set.
 

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2000 Seville STS
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Just to follow up. I put about a can and a half of refrigerent in it and I now have ice crystals forming on my ear lobes when I'm driving. Thanks for the info.
 
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