John, if you research other forums where they offer a FL model you will see the same complaint. Remember you have a much lower ceiling in your Living Room compared to the rest of us. Could you use a fan to help draw more cool air into the LR to aid in cooling?
We must be the lucky ones, our T-stats seem to be right on. With both running set at 72 with fan on (not auto) we were able to keep it 72 while the outside temps were in the mid 90s. When on 30 amp service at a recent Samboree where we could only run one about the best we could do was keep the inside temp approx 10 to 12 degrees below the outside temp.
Michelle & Ann
2018 Chevy 3500HD Crew Cab High Country DRW, D/A, 2016 RW39MB, Dual ACs, Auto Level, Auto Sat Dish, Stack W/D, King Sleep #, 17.5" Sailuns w/Disc, MORryde IS & Pin, Comfort Ride Hitch, 5.5 Onan, Res Fridge & Induction Cook Top