Customer Questions and Answers for Refrigerator Defrost Timer by Whirlpool

James, you will want to check the frost pattern of your evaporator. Being that the ice maker is not producing ice, it means the ice maker is not reaching a proper temperature to be able to produce ice (or the ice maker has an issue). Terminal 2 on the defrost timer sets the timer for 8 hours of compressor run time before defrost occurs. If the compressor is running and there is a low frost pattern on the evaporator after 10 minutes of run time, then there is a sealed system issue. If there is excessive ice build up on the evaporator, then you will need to test the bi-metal as the bi-metal will stop voltage from going to the defrost heater.