Manual Operation
This system offers a full complement of manual override features.

There are seven fixed blower speeds.
Use the outer dial control to regulate the amount of air forced through the system in any mode you select. The blower speed increases as you move the control clockwise and decreases when you move the control counter-clockwise.
The blower fan speed can be set to any fixed speed by adjusting the blower control outer dial. The fan will now operate at a fixed speed until additional speeds are selected. This allows the front occupants to control the volume of air circulated in the vehicle and cancel the Auto mode.
The operator can also select the direction of the airflow by selecting one of the following positions.
Panel Mode

Air comes from the outlets in the instrument panel.
Each of these outlets can be individually adjusted to direct the flow of air. The air vanes of the center outlets and outboard outlets can be moved up and down or side to side to regulate airflow direction. There is a shut off wheel located below the air vanes to shut off or adjust the amount of airflow from these outlets.
Bi-Level Mode

Air comes from the instrument panel outlets, floor outlets and defrost outlets.
Floor Mode

Air comes from the floor outlets. Aslight amount of air is directed through the defrost and side window demister outlets.
Mix Mode

Air comes from the floor, defrost and side window demist outlets. This mode works best in cold or snowy conditions. It allows you to stay comfortable while keeping the windshield clear.
Defrost Mode

Air comes from the windshield and side window demist outlets. Use Defrost mode with maximum temperature settings for best windshield and side window defrosting. When the defrost mode is selected, the blower will automatically default to medium-high unless the blower is controlled manually.
Air Conditioning (A/C)
The Air Conditioning (A/C) button allows the operator to manually activate or deactivate the air conditioning system. When in A/C mode and the ATC is set to a cool temperature, dehumidified air flows through the air outlets. If Economy mode is desired, press the A/C button to turn off the A/C mode in the ATC display and deactivate the A/C system.
• If fog or mist appears on the windshield or side glass, select Defrost mode and increase blower speed.
Recirculation Control

When outside air contains smoke, odors, or high humidity, or if rapid cooling is desired, you may wish to recirculate interior air by pressing the Recirculation control button. Recirculation mode should only be used temporarily. The recirculation LED will illuminate when this button is selected. Push the button a second time to turn off the Recirculation mode LED and allow outside air into the vehicle.
Test yourself
A quick Jeep Grand Cherokee quiz: every answer comes with an explanation and a link to the manual page.