Either park so the fridge is not in direct Sun,or make a Simple Awning to Shade the lower Access panel.
Then monitor....watch the Temperature to determine if this helps.
Be sure to keep the fridge mostly full of non perishable items such as Water bottles or Beverage Cans while testing. No sense ruining Good Food.
These RV Fridges are easily affected by Ambient Outside Temperature and keeping them Shaded and Full really helps to maintain a constant temperature. Installing Fans in the Exhaust Flue helped Ours perform better,but shading the Lower Intake Without restricting the airflow worked even better!