Fire up the and let it run under load (turn on the AC). Switch the fridge to both electric and propane modes.
Look for discoloration or soft spots, especially around vents and AC units.
Check the corners where the wall meets the roof. 3. Check the "Shoes" (Tires)
Run the to check for pump issues and leaks under the sinks. 5. Research the "NADA" Value
RV tires usually "age out" before they "wear out." Even if the tread looks deep and chunky, check the DOT date code on the sidewall. If the tires are more than 5–6 years old, they likely need replacing due to dry rot—a cost you should negotiate off the asking price. 4. Test Every Single Appliance
Water is an RV’s worst enemy. When you walk into a used unit, use your nose first—if it smells musty or like heavy air freshener, be suspicious.
If you’re living in it, you’ll want the space of a Fifth Wheel or a Class A motorhome. The DIYer: 2. The Golden Rule: Inspect for Water Damage