Lexus ES-300 2001 Manual page 240

AIR CONDITIONING
20E097
" 1 Fan speed at low
2 Fan speed at high
If manual switching of air intake is desired –
The fan speed can be set to your desired speed by
pushing the appropriate side of fan speed control button.
The higher the fan speed is, the more air is delivered.
Pushing the "OFF" button turns off the fan.
To remove exterior windshield frost, use the high speed
setting.
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