Originally Posted by Iowa camper
I would definitely check my thermostat first. It could be going bad. After that it could be a lot of different things so I would take it to the dealer. RV a/c is a whole lot different than a house one. If you have a multimeter then check the thermostat to see if its going in and out.
The operation of both RV and house A/C units are the same, the big difference is the voltage requirements. The stat in a house operates on 24 volts AC and the high voltage is 220 volts, and the stat for an RV operates on 12 volts DC, with a high voltage requirement of 120 volts AC. Stat voltage is called control voltage and the supply voltage is to operate the compressor in the unit it self, this high voltage. There are some applications where line voltage is used as control voltage for the stat. The components in both RV and House units have the same function but operate in different ways because of engineering and it's application. I am going to stop at this point, this could get very long and I don't want to bore any one..... As far as your unit shutting down and not re-starting, you may have some kind of air restriction and the unit may be going off on high head pressure. A high pressure switch has to be re set manually and you may be doing that by turning your unit off then back on again. If your unit is low on charge, the low pressure will shut the unit down, but it will restart on it's own after the pressure becomes equalized but it will again and again, this is called short cycling, not good for the unit.