Toyota Prius 2011 Manual page 288

3-1. Using the air conditioning system and defogger
Micro dust and pollen filter
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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.
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In rainy weather, the windows may fog up. Press
Maintenance of the air conditioning filter
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The air conditioning filter must be cleaned or changed regularly to maintain
air conditioning efficiency according to the maintenance schedule. In dusty
areas or areas with heavy traffic flow, early replacement may be required.
(For scheduled maintenance information, refer to the "Owner's Manual Sup-
plement/ Scheduled Maintenance Guide".)
When inspecting, cleaning and replacing the air conditioning filter, contact
your Toyota dealer.
If air flow from the vents decreases dramatically
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The filter may be clogged. Contact your Toyota dealer.
When Eco drive mode is on
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If the outside temperature exceeds a preset temperature, the system will
switch to recirculated air mode.
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The effectiveness of the air conditioning will be lower than normal.
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The fan speed level drops below the normal rate.
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