OP............
Your warm fridge is due to lack of outside fan operation and/or lack of proper installation clearances/airflow obstructions/dead air spaces.
RV absorption fridges require very narrow clearances so that air flow (Draft) is up/thru/across absorber tubes and evap/condenser fins
I highly doubt it in an airstream that its not installed correctly...
If you dont have a trap hot air will get in. The small drips in the tray flowing out the tube does not block the line.. You need a trap. You can gain 10 degrees just with that one fix.
Hot air is getting in if the OP dont have it..
Could be a door seal.
Could be a level issue.
IMO an extra fan is not needed. Solar roof one or one in fridge. Especially in a brand new airstream..
Maybe in an old unit caked with dust, no trap, weak element your just compensating...
Last what are you reading the temps in the fridge with??? Thermometer? Digital? Did you check its accuracy? Some **** bought from china at worth a darn...
too many variables here IMO...
