Toyota prius Owner's Manual page 352

3-1. Using the air conditioning system and defogger
Pollen removal mode

 In order to prevent the windows from fogging up when the outside air is
cold, the following may occur.
• Outside air mode does not switch to recirculated air mode.
• The air conditioning system operates automatically.
• The operation cancels after 1 minute.
In rainy weather, the windows may fog up. Press

 Condensation may appear on the windows if this mode is used in abnor-
mally high levels of humidity.
 Pollen will be collected by the filter even when micro dust and pollen filter
mode is OFF.
If air flow from the vents decreases dramatically

The filter may be clogged. Contact any authorized Toyota dealer or repairer,
or another duly qualified and equipped professional.
 Operation of the air conditioning system in Eco drive mode
In the Eco drive mode, the air conditioning system is controlled as follows to
prioritize fuel efficiency:
 Engine speed and compressor operation controlled to restrict heating/
cooling capacity
 Fan speed restricted when automatic mode is selected
To improve air conditioning performance, perform the following operations:
 Adjust the fan speed and temperature
 Turn off Eco drive mode (P. 222)
 Customize the air conditioning control of Eco drive mode. (P. 591)
 When outside air temperature is below 0 °C (32 °F)
The cooling and dehumidification function may not operate even when
is pressed.
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