Originally Posted by deder_2
Also you can be driven and have it turned to 60 degrees in manual mode and the heat kicks in, like the full 90 degrees has been pushed. The blower motor comes on after 10 seconds to 20 min of driven. At no given point while driven it will start to blow ice cold air and then the compressor will kick out, sometimes blower stops.
Again the blower stopping and wandering speeds sounds like the BCM (blower control module) which varies the blower speed to adapt with the requests of the programmer.
The changing temperatures sounds suspiciously like the actuators that move the blend doors. I do not know for sure that you have two actuators with the automatic system... does your car have separate control for the passenger temperature?
The electric actuators can slip on the hub internally. The result is the outside arm that moves the metal link to the blend door doesn't correctly move that door. The computer has lost its index marks for the positions of the door in its memory because of the slipping. So when the programmer turns on, it moves the door to full hot (or cold) and sees if it gets a resulting temperature change in the temp sensor. Then it goes the other way to find what actuator position gives the full movement in the other direction. If there'* slipping..., then the computer is lost.
Try taking off the hush panel and the glovebox door to see more of the movement. You can watch with the engine off while you have the key ON and change the settings of temperature if you have the automatic system.