More than likely this is an outlet servo motor issue.
I suspect this is what you were talking about when saying the damper.
Here is a guide that will help with this issue in general:
https://www.2carpros.com/articles/low-or-no-air-flow-from-vents
Below you will find the info from the manual on the servo.
If you are talking about something different, please let me know and we can dig further into that.
Thanks
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Thursday, January 20th, 2022 AT 6:02 PM