Hi,
There is an intake actuator. That is what determines if you are set on fresh air or recirculating. What I would recommend is to locate the actuator, and make sure the connector is tight as well as the actuator.
If both are good, chances are the actuator is going bad. I would remove it, and while it is still connected, see if it responds when you change from fresh air to recirculate.
The actuator is under the dash but really isn't too hard to access. You need to remove the glove box, behind the glove box and to the left, you will see a black plastic cover. See pic 1 below.
Remove that cover to access the actuator. See pic 2.
Let me know what you find or if you have other questions.
Take care,
Joe
See pics below.
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Wednesday, June 15th, 2022 AT 10:55 PM