It usually takes some tweaking for getting a Norcold to run right and unlike an old Dometic we had, it still takes forever for it to get down to temp. so we just leave it on all the time and don't bother taking the drinks and such out of it.
Right now I have two after market fans in the back, along with an ARP box in the circuit and it does fine in the driveway on low, but know that once it's in use with the doors being opened and closed, it will call for more heat and start tripping the ARP now and then, sooooooo, I'm thinking that I need to move the sensor up the tube a bit, where it's hopefully not so hot.