I didn't know the config. as far as blowers for it. From what you said I'm guessing there is one for the winshield/upper vents, and one for your feet area. Maybe not, like I said I am just getting a lot of draft from the passenger side and this has only been within the last month. It has been fairly nice at 0-20 degrees lately and I am glad that it wasn't doing whatever it is doing when it was -30 to -50 degrees out. I'm kind of clueless as of now as to what the deal is. Thanks for the reply, and I hope you or someone can help me figure what the deal is. Thanks...