2007 impala temperature control circuit

Hi, I am experiencing an issue where my car blows hot air out of the driver side vents and cold air out the passenger side vents. The system is throwing code b0418 temperature control circuit stuck. After fussing with the blend doors, both sides will blow hot air, but only after an unusually long period of time. I suspect the temperature actuator is at fault but am unsure. Does anyone have any insight?
Car info: 2007 Chevrolet Impala LT 3.5L V6.

If you have two temp actuators, swap them and see if problem moves......also manually move the doors with actuators removed, to make sure they are not binding....