First and foremost, I only get air out of the floor and defrost vents(and a small air flow out of the one in the center panel, towards the backseat). It'* been way too hot/rainy lately for me to poke around like I've been reading about, plus I don't have access to any jacks or stands, other than the carjack for changing the tire. I believe my issue has to do with something being unplugged or a door being closed, because the electronic system says air is coming out of the front vents, but it isn't.
However, starting yesterday I get an intense vibration in the pedals when the air is running. Turn it off, vibration stops. Ideas?