Thanks for the tip. I pressed the power cool and power freeze buttons for 8 seconds and the screen turned blank. Nothing showed up after the screen went blank so I pressed them again and it went back into it's regular mode. Any conclusions?
I am assuming that you have a good frost pattern on both evaporators.
Check the evaporator fan motor to see if it's frozen. Since it only works for 48 hours then shuts off, I can assume that the fan motor is your problem.