Kia Optima: Mode selection
The mode selection button controls the direction of the air flow through the ventilation system.
Every time you press the mode selection button, the mode will change as follows:

Refer to the illustration in the “Manual climate control system”.
Face-Level
Air flow is directed toward the upper body and face. Additionally, each outlet can be controlled to direct the air discharged from the outlet.
Bi-Level
Air flow is discharged towards the face and floor.
Floor-Level
Most of the air flow is directed to the floor, with a small amount of the air being directed to the windshield and side window defroster.
Floor/Defrost-Level
Most of the air flow is directed to the floor and the windshield with a small amount directed to the side window defrosters.

Defrost-level
Most of the air flow is directed to the windshield with a small amount of air directed to the side window defrosters.

Instrument panel vents
The outlet vents can be opened or closed separately using the thumbwheel. Also, you can adjust the direction of air delivered from these vents using the vent control lever as shown.
Manual heating and air conditioning
Temperature controlInstallation
1.
Install the head lamp bulbs.
2.
Connect the connectors.
3.
Install the head lamp bolts (2EA).
4.
Connect the negative (-) battery
termi ...
Removal
1.
Turn ignition switch OFF and
disconnect the negative (-) battery cable.
2.
Remove the air duct (B) and air
cleaner assembly (A).
3.
Disconn ...
Front Turn Signal / Position Light Bulb Replacement
1. Remove the bolts from the headlight assembly. ...