Air Condtioning on 2009 Nissan Versa

I have a 2009 Nissan Versa Hatchback. When I run my air conditioner, I get a sickly sweet odor throughout the car. The odor comes and goes. It only happens when the AC is running. Has anyone else had this problem?

Asked by for the 2009 Nissan Versa
I had the same problem and it started happening half a year after I bought it. Asked the dealership, they said that condensation builds up in there and the only way to fix the smell is to get a flush done. I havent noticed it lately but when I turn the a/c on i run the regular air after for a couple minutes. Hope it helps, some one more technical will probably say to go with the flush