I have an 04 FX4 without the center counsel and manual heat ac controls, my issue is when it gets really cold out, the heater will cook my feet on the drivers side, but the passenger side floor is ice cold even with the heater on floor only. I almost feels like there is a draft of outside air coming in to the cabin under the dash. Now i know the blower fan is located under the dash on the passenger side and the fresh air damper is there as well but something just doesn't seem right for that much difference between driver and passenger sides. Any ideas or straight up solutions are welcome. Thanks in advance.