Hi,
It sounds like the mode door actuator is failing or could even be loose. I'm not sure if you have manual or automatic climate control, so I went with the manual.
If you look at the pics below, they are the directions for the removal and replacement of the mode door actuator. Take a look through them and let me know if they help.
Take care,
Joe
See pics below. Note: If you have automatic climate control, let me know. Also, the last pic shows the location.
Images (Click to make bigger)
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Monday, May 23rd, 2022 AT 7:48 PM