DTC B2415-77: Air Mix Motor - Passenger: General Description
WARNING: This page is about a different car, the 2021 Kia Soul. However, it is still accessible from the selected car via links, so may be relevant.
The passenger temperature actuator (air mix potentiometer) located on the heater module, regulates the temperature signal from control unit by adjusting the position of temperature door based on operating temperature switch. The temperature will be regulated by the hot/cold air ratio decided based on the position of temperature door. The potentiometer signal sends the temperature door position value to A/C control module.