Hello Brian, Thank you for the question. I suggest testing the Defrost Thermostat, PartSelect Number PS2350702. The best way to do this is to remove the thermostat from the refrigerator so you can control the temperature of the sensor. You can let the sensor warm up to room temperature. With the sensor warmed up to room temperature the sensor should read approximately 6.2K Ohms at 68°F. With the thermistor submerged is a glass full of ice water, the sensor should be very close to 32°F which should read approximately 16.3K Ohms. If the values that you are getting are far off from these readings, then the sensor is bad and should be replaced. You can also test the Heater, The heater should have resistance and not open (o-ohms). Hope this helps!

Hi Cindy, Thank you for your question. You will need to test the defrost heater with a multimeter. Here is a link to one of our videos on YouTube that you may use a general reference on how to use one, https://www.youtube.com/watch?v=bWC44fHn0As. If the defrost thermostat was not working correctly, then the heater would get hotter. The reason for this is the thermostat instead of faulting to the open position, would remain closed. I hope this helps. Thank you and have a great day!