Never had this problem before I let the car set for 3 years. I recently had a new moter and trans put in as well as all new a/c plumbing minus the under dash lines. Now no matter what setting I put the a/c it kinda of does it own thing, sometimes brought the vents sometimes through the defrost but most of the time it's on the floor. It still blows cold but for the life of me I can't figure this out I have replace the switch panel with no luck. Any idea how I can find the leak or the problem? Thanks