I have a ‘22 3100RD which is not the same, but comparable. If you do not have the optional bedroom AC, it will be hard to hold 70 on a hot day. Also I assume your thermostat is in the hallway outside the bath. In my experience, this location can run cooler than the main living area if the nearby ceiling vent is pointed toward that area and potentially stop AC before the extremes are cooled. Just a thought.