The temperature control knob allows you to control the temperature of the airflow in the vehicle.
To change the temperature:
Kia Cee'd JD Service Manual: Cowl Side Trim Components and components location
Component Location
1. Cowl side trim
...
Kia Cee'd JD Service Manual: Front Disc Brake Components and components location
Components
1. Guide rod bolt
2. Bleed screw
3. Caliper carrier
4. Caliper body
5. Inner pad shim
6. Brake pad
7. Pad retainer
8. Return spring
...