I could be way off here, unsure just how similar RV refrigerators are to home ones, but every refrigerator I ever bought, I had to raise the front legs just enough that the door would shut automatically when left open. If you had them too low, the door just stayed open. Gravity is all that shuts them. I've never seen any magnet on a refrigerator door. I just looked at our home LG refrig, and it doesn't have any magnets or devices to hold it shut.
I could be way off here.
But I'd for sure go see if I could raise the front legs........they should be adjustable..and see what happens, before I did anything else.
"Next to prayer, fishing is the most personal relationship of man"Calvin Coolidge
"American by Birth, Southern by the Grace of God"Lewis Grizzard
2016 GMC Denali 3500Dually--2017 CC 36CKTS