when we took delivery of our 2016 Suncruiser 38Q we found that the convection/microwave door would not solidly latch closed. dealer swapped out the unit but the problem persisted. while we were waiting for a solution from the factory we used bungees to keep it closed. a few weeks later the oven mfg came up with a new design latch that worked. you might check with the oven mfg.
the larger issue is why this wasn't caught at the factory when the unit rolled off the assembly line; during transport or certainly during the PDI at the dealer. this was just the beginning of our troubles with our new but now out of warranty 38Q...21 different issues in all during the first 15-months of ownership and about 7-months of actual use. some issues were major like the front street side slide not extending and three different water leaks in the same place and some not so much like one of the footstools on the couch falling apart but all were troublesome.
I finally wrote a 12-page letter to Winnebago Industries listing in great detail all of the issues we've experienced and sent it to the chairman, CEO and three VP's. the upshot was that Winnie picked up about 20% of the repairs but virtually all of them can be traced back to a lack of proper quality control and/or poorly engineered parts (Schwintek/Lippert) both of which are Winnie's responsibility to catch before the RV rolls onto the dealer's lot. to their credit our dealer's service dept. has generally been great.
as for securing the resi fridge...the swivel "lock" on the freezer works well and both of the main doors are secured with the same sort of heavy duty drawer/cabinet latch. we've never had a door pop open on us.