You have not included any information regarding your camper or model of appliance either in the post, your signature, or your profile, so any help you get will be very generic in nature.
1) If in warranty, return to the dealer
2) If not in warranty, return to your dealer with your checkbook.
Generic installation instructions for the common DM2652 fridge are attached to show you how that model is installed. Maybe that will help if you want to try fixing it yourself.
Lou and Laura with Bella - German Short Hair Pointer
2008 GMC Sierra 2500HD Crewcab SB Allison Duramax
2010 Flagstaff 8526RLWS - Superglide 3300
HAM CALLSIGN - KC3FFW