In case you are new to RVs and have not used the ACs before. They do not cool as a home might. To get the inside cool in hot temps you need to start the ac system up early and keep it going and put up with the noise. Check your manual it says something like the most different inside temps it can change is 20 degrees. So, 100 degree inside temps will lower to 80. Start AC when at 80 and maybe it will hold lower thru out the day. I know from traveling in 100 plus heat all day, than parking the inside never gets cool enough for me until hours later.
2013 24RKSWE (27ft TT) Cougar 1/2 ton series
2013 Ford F350 4x4 CC 6.7 engine, 8 ft bed 3.55 rear end lariat package
Retired from Oregon State Police in 2011 than worked another 9.5 years as a small town traffic cop:
As of 05-2020, I am all done with 39 years total police work. No more uniforms for me.