[DutchmenSport]

Get a thermometer and put it right at the outlet vent and get the actual temperature of the air blowing at that point.

Once an RV get's hot, they are hard to cool down. The space is just too much, there are too many drafts, the insulation in the ceiling and walls is nothing compared to your home. Add the space of the height of your ceiling, the space of the slide outs and that's a lot of space for a single AC to cool.

In order to cool and keep the camper cool, the AC really needs to be started in the morning, and both AC's need to be running. One by itself just can't do it, that's why the manufactures installed 2 of them.

In a pinch, you can retract all your slides, reducing the space to cool. Then once the main body of the camper cooled down, open one slide and let the system equalize again. Then open the next slide. This is how we do it after traveling all day and first landing at the next campsite and the inside of the camper is 95 or 100 degrees.

Your best bet is to use a thermal thermometer and shoot the beam directly into the outlet vent and see what's really coming out there, what the temperature actually is.

In my Montana High Country (41 feet long with 4 slides), the temperature blowing out of the closest vent to the AC is 45 degrees. In the middle of the camper, the kitchen countertop reads 78, the walls 80. Of course outside temperature and a cloudless day and being under trees or in direct sunlight makes a big difference in those temperatures too.

Again, check the actual temperature at the vent. If it's blowing warm, then something else is going on, most likely the settings on your thermostat.