Lexus RX400h2006 Owner's Manual page 306

— 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 defrosting 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 automatically changes the air intake mode to select
the OUTSIDE AIR mode. This clears the front view more
quickly. It is not possible to return to RECIRCULATED AIR
mode in this position.
Push the "A/C" button 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.
AIR CONDITIONING
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