Mode Selector Buttons

The heater and A/C control has a mode selector button for each of the following operating modes:
^ OFF
^ AUTO
^ PASS
^ UPPER
^ LOWER
^ FRONT
^ DEFROST
^ DEFOG
^ BI-LEVEL
^ A/C
^ RECIRC
^ REAR DEFOG

If the driver presses AUTO, the heater and A/C programmer tests the internal temperature that is selected by the operator and the information that is provided by the system's network of sensors.
The heater and A/C programmer initiates the appropriate air intake point, air discharge points and activate/deactivate the A/C compressor.