This part is a temperature sensing devise. It senses the rise in evaporator temperature during a defrost cycle and cycles the defrost heater off after all frost is melted. It is calibrated to permit...
Used a screwdriver to remove covers. Used a blow dryer to defrost coil in freezer. Cut zip tie and removed old controller assembly. Inserted new controller assembly and secured with zip tie. It took 24 hours for the fridge to cool completely. Now it works fine.
I was told the mother board went out. Took a few months to finally get one myself after repairman didn't come through. It turned out not to be the motherboard that sears repairman tested it for and said that's what it needed. I found Parts select after going round and round with sears parts refusing to accept return. There prices were better, as well as shipping and it came so quick i thought it was over night. The controller assembly was not the problem so we have it for a spare now. It was the freezer fan but even after installing it nothing would work is why we ordered the controller assembly. after 2 days and about 7 hours of checking, taking apart, rechecking assembling by my determined electrician it turned out to be a loose wire. LOL hope this helps someone. I'm just glad to have my fridge again! Blessings!!!