I have actually done this recently on mine.. I didnt have any specific odor but it just wasnt like a new A/c car per say..
I had a can of this left over in my detail supplies from a previous car i used it on
Amazon.com: OZIUM AIR SANITIZER 3.5 OZ BY MEDO (OZM-1) ORIGINAL SCENT: Automotive
Can get at walmart or autozone for like 3-4$
Took out my cabin filter, car running with ac and sprayed it in there. Let it run for a few min, try not to breath it in when your spraying, or when you get in the car to shut it off.
Been over a week now and the air vent fan or when a/c on smell is neutral now.