Bob,
My a/c has to work hard to get cool also. Its in the high 90* here and since I just bought the mh I've been inside working on it for the past week.
Look here to see a couple of things I did to help cool the inside.
http://www.thorforums.com/forums/f27...mods-4609.html
The insulation, curtains and Costco fan have made a big difference.
The cold is air coming out but it does not circulate very well The fan moves lots of air and is quite. That would be the first thing I would suggest you do. Insulation and curtains if need after that.
Good luck.
Jerry