Our Dometic AC does the same even at low outside temperatures at night when it only needs to run infrequently. In auto, it runs on low for a while, then the fan goes off while the compressor continues to run for 5 seconds, then the fan comes back on high for about 30 seconds, and then the whole thing shuts off for a while. There is no doubt in my mind that the temperature never gets more than a degree or two from set point. It does not make sense to me that this is the auto special feature. If Dometic can’t come up with a fix, I’ll rewire the whole darn thing to run on a residential thermostat—no this probably won’t be the simple re-wires that have been posted on this site.