It's a good idea to check the fuse box in your RV if you're having trouble with your fridge. RV refrigerators can have fuses, and if one of them has blown, it could be the reason your fridge isn't working. You'll usually find the fuse box near the battery or in the storage area where the power cord is stored. Once you've located the fuse box, check to see if any of the fuses are burned out. If so, replace them with new ones and see if that fixes the problem. If not, you may need to call a professional for help troubleshooting the issue.