Suggest placing a level on the floor of the coach and noting the bubble positions with the level in line with the frame and cross frame. Then put the level inside the refrigerator and observe the bubble in similar orientations. You may find the appliance shelf is not in the same plane as the floor and one might need to compensate for that difference went setting up the trailer.
In the trailers with a refrigerator chimney, I think the suggestion for several 12Vdc manually controlled exhaust fans mounted close to the ceiling opening would certainly help move the air past the coils on a hot day. Perhaps, in addition, some fans also mounted lower in the cabinet directly below the coils blowing air upwards across the coils would be the best effort at cooling.
In the models with the two side doors and no chimney, I think the secondary fans blowing upwards across the coils as well as the exhaust fans on the top door would be optimum.
WBCCI Life Member 5123, AIR 70341, 4CU, WD9EMC
TV - 2012 Dodge 2500 4x4 Cummins HO, automatic, Centramatics, Kelderman level ride airbag suspension, bed shell
2014 31' Classic model 30 twin beds, 50 amp service, 900 watt solar system, Centramatics, Dill TPMS, disc brakes, 16" tires & wheels