[buzzcop63]

Watching a Trailer Life video on how level a trailer should be for the refrigerator to operate without damage the moderator who owners an RV repair shop said that if you place a round target level on the floor of the freezer section and the bubble stays at least half way in the center then you are level enough for its operation. He also stated that leaving a refrigerator for more then half hour that is not level can start damage, this I believe was while the unit was in operation. I use this method and once I found level with the bubble in dead center of the target ring I stuck on the front and side bubble levels on the outside of the couch, also checked with carpenters level on the floor and kitchen counter, all centered.