Lexus GS430 User Manual page 297

Touch the "A/C" switch for dehumidified heating or cooling.
This setting clears the front view more quickly.
D Only humid days, do not blow cold air on the
windshield—the difference between the outside and inside
temperatures could make the fogging worse.
—The outside of the windshield
For best results, set controls to:
For automatic operation—
Temperature— Towards high temperature
Air intake—OUTSIDE AIR
Air flow—WINDSHIELD
For manual operation—
Fan speed—To the desired fan speed
Temperature— Towards high temperature
Air intake—OUTSIDE AIR
Air flow—WINDSHIELD
When the windshield air flow button is pushed, air flows mainly
from the windshield vents and turns on the defogging function
with the purpose of clearing the front view.
Pushing this button once again returns the air flow mode to the
last one used.
This button allows the air intake to select OUTSIDE AIR mode
automatically. This is to clean up the front view more quickly.
If you want to return the setting to RECIRCULATED AIR mode,
push the air intake control button once again.
Touch the "A/C" switch for dehumidified heating or cooling.
This setting clears the front view more quickly.
D To heat the vehicle interior while defrosting the windshield,
choose floor/windshield air flow.
(e) Center vents, side vents and rear vents
G21015
"Center vents
AIR CONDITIONING
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