We have the same refrigerator in our 2016, 34RL Cedar Creek unit. In our unit the refrigerator is level and has space above the unit. We camped all year with this trailer and never notice any undo heating issues with ours.
Have you had your dealer look at the unit to see if something is incorrect? Have you personally contacted Cedar Creek reps over this issue?
2016 34RL CC; 2008 Ram Mega Cab 2500HD, 6.7L, 68RFE 6 speed, 4X4, Smarty S67