Thread: blenderbox problems??

had this problem before but it came out of it .the problem is that "i think " the doors are not closing all the way . when it worked good and it was on where its suppose to blow out the front of the dash it would bloww hard . now it blows out the dash but also the defrost and a little at the floor .when it was bad it only blew at the floor .my ? is if i put a vacumn pump on the hose going to blenderbox should it hold a vac. if so and it does not what is the next step to fixin