Sean,
What temp is the refrig section running? A hot/humid environment and poor air flow over the coils will reduce efficiency a lot. Make sure the fans above the coils are both running (pretty sure your coach has them). DO NOT stick a screwdriver, etc, toward the fans. Use a flashlight and/or mirror. Speaking from experience, if you break a fin from one of the fans, you'll have all kinds of fun replacing the fan by feel.
Steve