Door skin cracking

[aatauses]

Hello everyone,
This is a new one for me. We have a 2010 Bighorn, 3670. We have been parked for a month or so. The inside skin of the exterior door is cracking. It started on both sides of the window and ran horizontal to the edge of the door. Now, we have noticed another crack starting about midway to the bottom running horizontal. Any suggestions? How would I seal the existing cracks which are about 1/16 or 1/8 " wide? Do you think this will continue and what would have caused it to begin with?
thanks
currently in AZ
al

 

[sengli]

We had the same issue with our elkridge fiver the first year we owned it and it sat out over winter. I am pretty sure the change in temps caused the plastic lining to crack. And yes, that crack just kept getting bigger as time went by. Since I was told they could not repair this, they replaced the entire door assembly under warranty.