Toyota 2008 Prius Quick Reference Manual page 241

Adjusting the position of and opening and closing the air outlets
Front outlets
n Using the automatic mode
Fan speed is adjusted automatically in accordance with the temperature set-
ting and ambient conditions. As a result, the following may occur.
l The system may switch automatically to recirculated mode when the
coolest temperature setting is selected in summer.
Immediately after the switch is pressed, the fan may stop for a while until
l
warm or cool air is ready to flow.
n Using the system in recirculated air mode
The windows will fog up more easily if the recirculated air mode is used for
an extended period.
n Window defogger feature
Recirculated air mode may automatically switch to
in situations where the windows need to be defogged.
Outside temperature approaches 32°F (0°C).
n
The air conditioning system may not operate even when
2-way air intake control
n
To improve fuel economy, OUTSIDE AIR mode control changes when the air
intake selector is set in OUTSIDE AIR on the following conditions:
l When the maximum heating is needed with the air flow in "Floor" or
"Floor/Windshield", fresh air flows in the upper compartment, while air is
recirculated in the lower compartment.
When cooling is needed, both fresh and recirculate modes turns on.
l
PRIUS_U_(L/O_0802)
3-2. Using the air conditioning system and defogger
Direct air flow to the left or
right, up or down
Turn the knob to open or close
the vent
ITY32P008
3
(outside air) mode
is touched.
213