Chevrolet 2002 Astro Owner's Manual page 152

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(Bi level): With this setting, the outside air comes
out both the instrument panel vents and floor ducts.
Adjust the temperature knob for warmer or cooler air.
(Floor): Most of the air comes out near the floor.
The rest comes out from the defroster vents under the
windshield and at the front side windows.
(Blend): With this setting, the outside air comes
out both the floor ducts and defroster vents. Adjust the
temperature knob for warmer or cooler air.
DEF (Defrost): This setting operates the defroster.
Most of the air comes out near the windshield, with
some going to the floor ducts and front side windows.
Heating/Air Conditioning System
(If Equipped)
If your vehicle has air conditioning, your heating/air
conditioning controls will look like this.
Fan Knob
The fan knob is located on the left of the control panel.
This knob has four positions. To increase airflow,
turn the knob toward HI. To decrease airflow, move it
toward LO.
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