I have a 2016 limited & have just started noticing this noise in mine a few weeks ago. It is constant when my heat/air is on, no matter the setting/speed/temperature, and it sounds like a cd is constantly spinning or when you load a game in a console & it just spins & makes that high pitched noise, if that makes sense. It comes from under my glove box. I took into the dealer who told me they couldn't hear a thing & that it's "gonna make noise", but it wasn't before. Stops the minute I turn it off. Now when I change from hot & cold I'm starting to hear another noise that sounds like something opening/shutting, so I'm assuming it's something to do w/ circulation & might be normal, but I've never noticed it until now. I took my filter out, which is new, & found a couple of leaves & nothing down in the fan that I can see.