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On the refrigerator, most likely somthing has fallen into the drain hole such as a pea or corn kernal even a piece of plastic can slow down the draining enough to let it freeze over. Once it has frozen over; you see the result. The freezer will have to be emptied and the back wall panel remove to gain access to the evaporator and then defrosting the ice blockage with a hair blower. With all the ice out of the way of the defrost drain troff compressed air can be forced through the drain tube clearing the blockage out. The nozzle or hose from air tank will have to be sealed to the drain hole so pressure can be created in the drain line itself. I have clean thousands of these type blocages out in this manner. Only once in over 20 years of refrigeration service did I have to pull the entire refrigerator out. I found where a screw had been dropped into the drain and the tube itself had to be removed. Good luck and keep us informed to the outcome.
Mike, RVIA & RVSA Certified Master RV Technician
Amy, Dr. Assistant - Roxie & Mei Ling, four legs each
2000 Gulf Stream Scenic Cruiser 450 hp & 1330# torque
06 Saturn Vue, 06 Chevy Z71 4x4 & 2014 Corvette Z51 M7