On our last camping trip we noticed our fridge was "leaning" outward a bit. On closer inspection I realized the supports that were holding up the fridge "shelf" were broken after opening up the space under our refrigerator. I reinforced the rails with small blocks (attached to the stiles), that's all that was supporting the base that our refrigerator! Then I cut down 2 pieces of 2" X 6"s and glued them into place under the base onto what appeared as the base of the slide out.
I decided to put a piece of hickory across the face of that "cabinet" for added support and re-install the decorative pieces originally attached to the face. NO more fridge "wiggling", squeezing or any movement whats so ever.
We had DRV "fix" this problem a year or so ago and it came back to haunt us. Now I feel as though it's done right.
If you look closely you can see the sagging.
My "cheater" blocks to get the shelf back to the right position.
The cut down 2 X 6s for extra support. BTW that bottom piece of plywood is a full one inch thick.
All done, no more worries.....
Dan