I had the same issue. I had my RV tech who I trust and he measured the intake air to the vent air and they should be 20 degrees apart. Mine was 10. I was able to get it replaced by my extended warranty. I up graded from a 13500 btu to a 15000 btu. Last weekend in Florida in full sun I set the temp to 72. Outside air was 95. It kept it cool at 72. I have a 28 foot Class C. Hopefully it will continue. Knock on wood.
__________________
|