Just added ARPrv unit to our 1200 Norcold. Kind of interesting to be able to see the temp of the flue. The basics as explained to us by the installer of the unit. Ours is running 348° on Electric and around 360° on gas. We are level. At present we are in the defrost mode to clear the fins at the back of the refrigerator and the flue is at 131°. Temps in the mid 600° area can lead to boiler failure. The ARPrv shuts down the refrigerator cooling unit to cool down in the mid 400° range on the flue. When preset temps are met it restarts the refrigerator's cooling unit. So the potentially damaging high temps in the cooling unit can't be reached.
