From another thread, someone suggested I ask a tech - help!:

http://www.peachparts.com/shopforum/showthread.php?threadid=68224

So here goes:

"So, I finally pulled the stereo, checked to see if the connnections were snug on the back of the thermostat wheel and the Climate Control buttons in the center - still no difference. Basically my A/C is operating like a house system - it cools down to the desired / dialed in temperature, then cuts off completely. When the temperature rises in the cabin and then the system 100% comes back to life. Here is some more detail:

When I dial in the temp between 18*- 20* C and just leave it alone in "Auto" using the normal A/C button (one white arrow), the A/C kicks in fine, will vary the blower speed as needed to cool the cabin, side and center vents blow, then "click" - it shuts down 100%. When I mean 100% you can not get the high or low fan to turn on at all. Just still dead air in the car until the temp rises again, and you hear the "click," and the A/C slowly kicks in again, varies the fan speed as needed, then “click” – it’s off 100% again.

Now while it is on its cool down cycle and the A/C is blowing you CAN cycle the high / auto / low, but once it cools off - "click" - dead still air - the fan speed buttons will not respond. It does not matter if I hit / cycle the "O" off button and then the normal A/C button or any combination of the fan buttons (high/auto/off). No A/C or fan until the temp rises in the cabin past where I have it dialed in on the wheel. While cycling between normal A/C and Off I think I can still hear the compressor engage, just nothing blows.

I did try the following. If I left the fan on high during the cool down cycle, it would cool down on high fan speed, cut off, dead air (temp rises in car), then the A/C would "click" and recover on the "high" setting."

So - Do I gamble and buy a $250 rebulit CCU (or whatever the horizontal pushbutton unit is called between the thermostat wheel and the fan switches)? That's an expensive guess

__________________
~shell
As of 2/2010:
2001 CLK55 0o\=*=/o0
13.6 @ 106mph
10K mi
1984 300SD
260K mi and going and going...
97 S600
46K miles
1991 Sentra SE-R (extremely dorked with)
www.se-r.net