Earlier this year I bought a 2001 Minnie 31C on a Ford chassie with an E450 V-10 engine. The RV has low mileage, 31,000 mi, and I have had extensive preventative maintenance performed to include brakes, trans flush, coolant flush, belts, oil etc. It runs well runs but the cab seating area on the passenger side is very hot and uncomfortable. Ford garage says the A/C and heater controls are performing correctly.
They noted a piece of loose insulation on the driver's side firewall that they fixed. The area around the AM/FM radio and the footwell get hot to the touch. It is really uncomfortable especially in hot weather. In hot weather the A/C will not keep up with the heat. I will be traveling from CA to Minnesota later this summer. Also the dash gauges seem to register normal. Looking for some cool ideas to chill it out.