If by close you mean to latch...as in you almost have to slam door. My rig was like that. There is a procedure from lippert on how to adjust the door. Basically on the latch side the door has a say 1/2 bow, so the top and bottom make contact and you have to flex the center by pulling on the latch to make it latch. You actually put a 2x4 in the door so the door won't close and flex it taking some of the bow out of the door,
There is an official procedure by LCI on this...but for the life of me I can not find it now.
