Strange sounds

[donno21]

2011 2500, Cummins, quad cab. 72,000 miles. A fluttering sound from the right side of passenger compartment when engine is started. If A/C or heat is on, you can feel the airflow "shift" from dash to floor, etc. It's like the blending doors are seeking their own location. May do it 2 or 3 times in a few minutes, then it goes away. Next start-up, same thing. Any thoughts or inputs? thanks in advance.

 

[Jho93]

HVAC mode door actuators. there should be a few (2-3) in your truck. they are attached to the hvac housing and responsible for moving the mode doors and it's not an uncommon thing for them to go bad with chrysler

Sent from my SM-G965U using Tapatalk