Hello All- I've been reading through a ton of search responses, and it looks like its the blender door, but wanted confirmation/where to get parts to fix. My 1990 vents work in the floor, vents (middle?), but when i go to defrost only, i get it partially through the defrost and floor. Anything i should check before i start replacing? Also, i plan on getting the AC fixed at some point (may not be until the spring though) so would it be better just to deal with it until then?