ChiefJohn, one comment is to move the defective thermistor up or down. I just got off the phone with Norcold, I called cause I was having the same problem with my 1200, the tec said that fix is for Dominic models and that I had a defective thermistor. He is shipping out a new one to me (free by the way), 4-5 business days and I should have it. By the way my 1200 had turned into a freezer, the entire box was freezing. It is and easy fix, just unplug the old one and put into place the new one. By the way the thermistor is about the size of end of your little finger, is located on the right side and attached to the cooling fin with a clip. Give the Norcold tec service department a call today.
Steve & Leslie
Forest River 2018 Forester 3011DS
Honda 2010 CR-V AWD "Toad"