Dometic Refrig is acting up - what are my options

I would check the distance from the outside wall to the cooling unit tubes. The distance should be less then an inch. I used some good insulating board to reduce the distance. I used Liquid nails to attach it to the frame work of the rig.
Reducing the area makes more air go through the cooling unit increasing efficiency.
If this is in a slide check to make sure the upper air outlet has air deflector to move air away from the void on top of the refer. Make sure the fans are working.