Kia Optima: Recirculated Air positionWhen the air intake control switch is depressed (switch indicator illuminates), almost all outside air flow into the vehicle is shut off and air inside the vehicle is recirculated.
This position can be used temporarily for maximum heating or cooling (if equipped with air conditioning) and to help prevent undesirable outside air flow into the vehicle.
Outside (Fresh) Air Position
When the air intake control switch is not illuminated air enters the ventilation system from outside the vehicle. Use this position for normal ventilation and heating.
Automatic Operation
Heating and Cooling System OffRemoval
1.
Turn the ignition switch OFF and disconnect the battery
negative (-) cable.
2.
Disconnect the manifold absolute pressure sensor
connector (A).
...
Changing the coolant
Have the coolant changed by an authorized
Kia dealer according to the
Maintenance Schedule at the beginning
of this section.
CAUTION
Put a thick cloth or fabric around
the radiator cap befo ...
Recommended SAE viscosity
number
CAUTION
Always be sure to clean the area
around any filler plug, drain plug, or
dipstick before checking or draining
any lubricant. This is especially
important in dusty or sandy areas
and ...