Model is t-23-dt-g Refrig and freezer are set to 5. Freezer reaches 12 degrees and frig to 34 after being plugged in. compressors shut down and Temp in freeszer steadily rises from 12 to 50 in about 20 mins. and Fridge goes from 34 to 41. Then compressor turns back on. Compressors rarely turn off and only for a short time. Doors have not been opened during this time. I noticed the freezer door gets very warm during this time. What is the problem