Kia Sedona: Rear fan speed control
From front seat
Set the rear climate control selection (REAR ON) button to the ON position and turn the rear fan speed control (REAR) knob in the front climate control panel to the desired position.
To change the rear fan speed, turn the knob to the right for higher speed or left for lower speed.

From rear seat
Set the rear climate control selection (REAR ON) button in the front climate control panel to the ON position and set the rear climate control selection(REAR LOCK) button in the front climate control panel to the OFF position and press the rear fan speed control button on the rear control panel to the desired position.
To turn off the rear air conditioning system press the off button in the rear climate control panel.
From the rear seat
Rear temperature controlCrankshaft Position Sensor (CKPS) Schematic Diagrams
Circuit Diagram
...
Rear sunroof lock
When the power window lock switch is pressed, the rear sunroof control cannot
operate the rear sunroof. But The front master sunroof control can operate both
front and rear sunroofs (if equipped). ...