Hello everyone i have a 02 7.3, my heat is really hot but when i put it on the dash vents it has no pressure and barely comes out.. Im pretty sure i just need to change the filter truck has 322,00 miles and is original filter. but if you think its something else let me know. winter is coming and want strong heat. Also if it's the filter i want to know where the filter is and how to change it. Thanks.