We have been dry camped in lower NM and at about 6200 ft and the temp is at about 95 outside. Cools down at night. What we have done is go and get some PVC pipe and make a frame and cover it with a tarp held on with bungee cords. Lean it at an angle (to keep air flow) up against the slide out so it covers the fridge vents and side so the fridge wall is covered. It keeps the sun from heating up the outside of the fridge. Makes a big difference on the temp inside the RV Norcold 1200 fridge. We have been able to keep the fridge cooling not rise above 38. Think about it if the side of your rig is facing the sun in the afternoon shade it with some PVC and a tarp. Just feel the side without the shade HOT and under the shade COOL to touch.
Also move the sensor on the fridge fins to the last one on the right and at its top. Happy cool fridge to YA.
BTW I also added a 12v computer fan inside the outside fridge enclosure to help air flow upward.
