If you have lost control of the airflow direction, chances are the mode door actuator has failed.
A mode door actuator is what determines the airflow direction based on your request. Take a look through this link. You may find it helpful.
If you look below, I attached the directions for replacing the actuator on your vehicle. Do me a favor. Remove the actuator and while it is still connected, see if it responds when you change airflow direction. If there is no response, chances are it is the actuator.
Let me know if this helps or if you have other questions.
Take care and have a great Thanksgiving.
See pics below. Note, the pics below are specific to a manual climate control system. If you have automatic climate control, let me know.
Images (Click to enlarge)
Wednesday, November 23rd, 2022 AT 11:00 PM