If your fridge was off for a period of time and has reached outside temperatures, it can take 8 hours or more to reach proper temperature on electric. When we are going to go camping, we try to get there the day before and turn the fridge on propane so that we can load cold food items in it when we arrive to drive it away from storage.
2016 Jay Flight 33RBTS
Blue Ox SwayPro 1500
2006 Silverado 2500, LBZ Duramax, Allison Trans