[jcus]

Tell us more...vintage of coach?  Number of slides?  Roof air vs Basement?

My 4 slide coach would not stay cool in the front in high temps...but I did two things that really helped.

1)  Get some shades for the windshield and drivers and co-pilot windows.  Has had a huge impact.  

2)  Add a roof air.  My coach would stay cool in the rear, but had trouble keeping up in the salon area.  Adding a roof air fixed that problem.  Not cheap, but big impact.

On early four slide coaches with basement airs, the factory had to resort to all sort of magic to try to get the cool air from the basement to the living area.  If you have roof airs, I suspect that something is wrong.  My one roof air made all the difference.

I have a 45 ft no slide, with 2 front and 1 rear dometic basement ac's. It is in the mid 90's here in south texas and one fwd ac will keep the front about 80 inside, with 2, low 70's. Rear ac will keep bedroom and toilet in the 60's. My coach is almost all white and I have the awnings out. Much better than my last 40 ft coach with two roof airs, but that one was mostly a brown to black color. Color makes a big difference.