I had a similar problem with my old Pilot. If it is coming from area of glove glove it may have to do with the cabin air filter. With my Pilot it was a broken clip for the filter if my memory serves me right.When I run the fan (with or without the AC on) I hear a distinct rattling sound from the front console area . As soon as I turn off the fan as it spins down the rattle dies down with it. Anyone else experience it? Or know what it could be?
I took a recording with my phone will post later.