i normally know that my heat will cut out when on the highway with the plow on cause of the airflow and the outside temp sensor heats up from the radiator pushing air forward, usually seen by the outside temp gauge going up into summer temps when we know it's damn cold out. anyway today the outside temp was only at 45-50 degrees but i had no heat at all. then stopped at the bank and got back in the truck and all was well. WTF do you think could have happened? also is there a way to build a scoop to funnel air into the front gril? i was thinking of taking something and going across the plow headlights maybe 20 inches by 4 inches then angling down from the back point and going to the top of the grill opening to divert air into the grill as if the plow were off. has anyone tried this?