DTC B1283-13: Direction Potentiometer Open (Low) - AUTO Defog: General Description
WARNING: This page is about a different car, the 2021 Kia Seltos. However, it is still accessible from the selected car via links, so may be relevant.
While controlling the temperature and mode (direction of wind) set by driver, if the humidity is higher than certain level, A/C control module automatically controls auto defogging mode. A/C control module changes to go back to the previous driver set mode, if the humidity is decreased.
A/C control module automatically controls intake actuator, A/C, defogger actuator, blower motor rpm, mode actuator in accordance with the amount of humidity on the front glass.