Thanks. I found a diagram showing how the air mix door is separate from the driver, passenger and rear air output for each zone. Then I removed the main control panel (with HVAC, Stereo and Nav controls knobs), then partially loosened and lifted the CD changer to look for the air mix door linkage. It can be seen fairly well with a flashlight. Starting with temp on lowest setting at 60 degrees, the next setting up goes to 65, and could see a good amount of movement, then stepped the temp up one degree at a time and could see slight movements on almost every step up to 85 degrees. The final step up goes from 85 to 90 degrees, and again I could see a good amount of movement, plus (since the fan was set on high) I could hear the air movement changing significantly. So from 60 to 65 and 85 to 90 is where the most noticeable amount of movement and sound of air changing direction occurred. At this point, it seems like the air mix door and motor are working properly unless I'm missing something. Also, since the motor and linkage are moving at each temp adjustment, it seems the in vehicle temp sensor is working as the system knows to keep moving the door. I'm starting to think there is not enough coolant flowing through the heater core, although the line going into it is very hot and it heats well IF set on 90 degrees. Any suggestions?
Sunday, November 2nd, 2014 AT 7:00 AM