Hi guys,
Here is the problem: My HVAC and radio display lights used to go off every once and a while. I think the fan still worked, but I obviously could not see what adjustments I was making. They would come back on after I restarted the car. It really only happened when it was really hot out and the A/C was on. Also, my CD player skipped on every song of every CD, even new CDs.
Solution: Some Legacy HVAC-stereo units have the HVAC tube run right through the stereo. Condensation gets on it, which causes the CD player to skip and, sometimes, causes the entire HVAC-stereo display to short out. You have to replace the entire HVAC-stereo unit. My dealer actually pre-ordered one for me and replaced it under warranty with no hassle at all. Now I have no skipping and no display problems. Do not have your dealer replace only the display faceplate; it will not work. The newer HVAC-stereo units run the HVAC tubing outside the CD player.
Good luck, Chris