Weird A/C problem

Is the drivers side warm (ambient) or hot?
If warm, then you probably just need a refrigerant top off.
If hot, then it is more likely an air mix door actuator.

ELDO GUY said:

After" exercising "the system like Basscatt recommended , I noticed that in the air conditioning mode the drivers vents are not blowing as hard as the passengers , in the heat mode they appear to be equal . Momentarily I thought that It was working but then it went back to not working .

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Make sure there are no vacuum leaks.

Is there anyway to physical check and move the blend doors by hand to check for movement .

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Probably. look under the IP on the drivers side. Not sure how accessible things are down there.

Also is it possible for a screw or something to fall down a vent get in there and mess things up .

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Not likely.

Disclaimer:
The Eldo is different than my DTS console, but mine is pried loose from the rear, then work your way forward. The front has a 90 degree angle tab that is slid in to hold it. Pry the front and you break that tab.
Mine was broken when I got it and I had to JB Weld it. Once all the retainers are popped, you slide the panel rearward.

Check this link on Ebay. It has a picture of the backside. Look closely at the front and you can see the tab I'm talking about.
http://www.ebay.com/itm/Cadillac-SE...ver-/281713405917?hash=item41976d6fdd&vxp=mtr