RV Repair: Dometic Refrid. 2611 (warm), air gap, refridge

Question
Hey, thank you for your time. I have a Dometic RM 2611 Refridge in my trailer that I just purchased used. Lower unit gets real cold on a/c, top freezer doesn't cool off. When on LP, freezer gets real cold and  lower fridge doesn't. Yes it is level, no check lights on and seal is good.
Any thoughts?? Thank you again.

Answer
These are not typical cooling issues possible cooling unit with a plug in it and only boils at different rates. I would check the air gap around the fridge. May be that the heat is not moveing out of the fridge compartment and need to add a fan. Check the air gap around the fridge and let me know what it is we can check it with specs.