I believe the mounting technique used for the residential refers has went through many evolutions in the two years we've bene installing them. My current Frigidaire is very solidly mounted.
I do have a tip that may be helpful for some of the early installations of the residential refer...
TerryH and I remounted the Frigidaire in my last coach. I noticed that behind the plastic grill at the bottom of the refer just inboard of the front wheels are 2 long screws. These screws are used by Heartland to pin the refer in at the front. This is in addition to what they do at the top. Anyway, the screws go through existing holes in the sheet metal framework of the refer - below the condensation pan. This framework does NOT rest on the slide room floor. There is a gap of around 1/2". On my last unit, TerryH and I used a piece of wood to span/shim the gap from the slide room floor and the bottom of the sheet metal framework. We also pre-drilled a hole for the mounting screws to go through so as not to split the shim. To aid in installing the shim, we used the front wheel adjusters to run the wheels all the way down to lift the front of the refer. Once the shim was in place, we raised the front wheels to lower the refer and level it out, then we resinstalled the screws. I believe we used the next thickest screw too.
In that coach, Heartland used an piece of aluminum angle stock, screwed to the top of the refer case at the back, then screwed the angle to the wall. In my case, the screws had pulled out of the wall. I believe we installed a few heavier screws and I think we hit a stud with one of them. Then there was a sort of false wall above the refer and it was framed with a 2x2 (or similar). This is what really pinned the refer in to not allow it to tip forward. No change was made to this - we simply reinstalled it.
The above was in a Landmark. In Landmark 365, since the slide room is taller, there is now a full, deep cabinet above the refer. My refer in my new coach seems very solid. I've made no modifications to it.
