Hi,
I wonder if the mode door is moving enough to prevent air from entering the vehicle. Something is closing or moving to prevent the airflow from entering the vehicle.
Does the fan sound change when this happens?
At this point, you may want to remove the blower motor and confirm there is nothing in there that could be causing the airflow.
The blower motor is under the dash on the passenger side. I attached the directions below for the removal and installation procedures.
Let me know if that is something you would feel comfortable doing.
Take care,
Joe
See pics below.
Images (Click to make bigger)
Sunday, May 1st, 2022 AT 7:03 PM