Glad you got your problems "sort of" figured out. Once the replacement parts get installed, hopefully all will be "good to go" for you.
Keep in mind that as you indicated, the "inside the camper" temperature has no significant bearing on the refrigerator operation (within limits), the outside temperature does affect how the refrigerator functions. To explain, the rear of the refrigerator is "open to the elements" and there are vents at both the top and bottom of the outside area. The refrigerator is dependent on heat generated by either the electric element or the gas flame to "percolate" the cooling liquid, in your case, a helium mixture, so it flows in gas form through the cooling unit to absorb heat. Once the outside temperature falls below a certain temperature, the gas flame or the electric heating element can no longer get the cooling liquid hot enough to vaporize and the absorption process stops. While this will only occur at very low temperatures, it can, and does happen. You may want to discuss this with your service technician if you're planning to use your RV for extremely cold weather camping such as hunting, skiing or other winter activities.
2015 F250 6.7l 4x4
2014 Cougar X Lite 27RKS