To Prevent The Windshield From Fogging Up - Toyota avalon 2016 Service Manual

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5-1. Using the air conditioning system and defogger

To prevent the windshield from fogging up

The difference between the temperature of the outside air and that of the

windshield can cause the outer surface of the windshield to fog up, block-

ing your vision.

Do not place anything on the instrument

panel which may cover the air outlets.

Otherwise, air flow may be obstructed,

preventing the windshield defoggers

from defogging.

To prevent burns

Do not touch the rear view mirror surfaces when the outside rear view mirror

defoggers are on.

To prevent battery discharge

Do not leave the air conditioning system on longer than necessary when the

engine is stopped.

AVALON (U)_(01999-07001)

during cool air operation in extremely humid weather.