Kia Optima Manual page 190

Air intake control
This is used to select outside (fresh)
air position or recirculated air posi-
tion.
To change the air intake control posi-
tion, push the control button.
Recirculated air position
The indicator light on the
button illuminates when
the recirculated air posi-
tion is selected.
With the recirculated air
position selected, air
from
compartment
drawn through the heat-
ing system and heated
or cooled according to
the function selected.
OTF044318L
Outside (fresh) air position
The indicator light on the
button will not illuminate
when the outside (fresh)
air position is selected.
With the outside (fresh)
air position selected, air
enters the vehicle from
outside and is heated or
cooled according to the
function selected.
Prolonged operation of the heater in
the recirculated air position (without air
conditioning selected) may cause fog-
ging of the windshield and side win-
dows and the air within the passenger
compartment may become stale.
In addition, prolonged operation of
the air conditioning with the recircu-
the passenger
lated air position selected will result
will be
in excessively dry air in the passen-
ger compartment.
Features of your vehicle
4 117