Or that someone didn't use quality screws, plug in to power and turn refer on, will take several hours to cool, freezer first then lower compartment . My 5 year old class c had some rusty screws, but everything worked just fine. I would also hook up water to make sure all systems work, toilet holds water etc. water pump works and pressure is held. Also check water heater, should start warming in about3-5 min. Good luck and take your time
Jerry and Debbie
2015. Hurricane 32N /Kia Soul toad
Crawfordville Fl. Vietnam Vet.