I was perusing the website and came across an old posting about the Living Room slideout sagging. This is a problem that I have read about in other threads and I had the same issue. I contacted FR and they sent me the directions on how to fix it. It was not caused by water intrusion and was an easy repair. Here is a picture of the instructions.
you remove the wood trim
Prop up the middle sagging portion using a 2x4
Cut two "L" shaped pieces of plywood for left and right sides
Attach with the long side going vertically
Cut another piece to join them on the top of the Slideout
Attach them to the front
Reapply the trim