Hello,
It sounds like you might have a faulty mode door actuator that is stuck on the defrost position.
The mode door actuator controls which vent the air will flow from. Sometimes they malfunction and get stuck in one of the settings.
Here is a helpful guide:
https://www.2carpros.com/articles/air-vents-stay-in-the-defrost-position
The mode door actuator is located behind the center of the instrument panel (see diagram below).
I have attached the trouble shooting flow chart below for your reference.
Please let me know if you have any questions.
Thank you.
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Thursday, February 17th, 2022 AT 9:01 AM