Hi guys, I have a problem with my Lariat blowing cold air on the driver's side. It happened last weekend when it was snowing hard and drove around town for a couple hours with defrost on. After I got out on the interstate the cold air was blowing in through the vent on the driver's door and down by my feet. It was -4 driving home. I though that some ice may have gotten in and jammed a damper open allowing cold air in. I took the truck in and thawed it out and the same thing happens. Cold air out of drivers side and hot air out of the passengers side. The truck has the dual heat/cool setup and it seems as if the driver's side is stuck on cold but I have it set on just driver. Has anyone experienced this since the heat comes in handy. It was only -25 this morning. Thanks