Hello, I'm Danny.
It sounds like you have a failed or defective blend door actuator. It's a small electric motor that opens a door to direct hot air throughout the various air ducts in the HVAC box. Here is a tutorial showing what is involved for the blend door actuator replacement:
I've attached picture steps below for the blend door actuator replacement on your vehicle. Hope this helps and thanks for using 2CarPros.
Images (Click to enlarge)
Monday, December 7th, 2020 AT 11:49 PM