Hi, In my 2017 I have noise in the cabin air duct. I think when the tech pulled the filter something got past the fan and got caught in the air duct. Assuming the fan is right below the cabin air filter, The noise isn't there. While sitting in the passenger seat it seems like it is behind the center console. How can I check the duct and the fan easily. It sounds like a leaf or something flapping back and forth. Any help would be appreciated.

 

Welcome in, sometimes outside trash can make its way in but the filter should catch it. I once had this issue and not wanting to dismantle the dash took a shop vac reverse the flow and blew out the ducts it got rid of the problem and im thinking mine was a simple piece of paper . Try it if that does not work pull the cabin filter and check the inlet to the filter. You can find instructions on how to remove the filter on line. Good luck.