Step by step instructions on how to replace a Temperature Sensor #WR55X10025 for Refrigerator made by GE. I started in the freezer to no avail. Actual Temperature - This display removes the guesswork in setting refrigerator temperatures. The refrigerator-freezer temperature controls the operating temperatures of both the freezer and refrigerator compartments. Your appliance may differ depending on the manufacturer and model. This sensor (Temperature Sensor, Thermistor, Refrigerator Temperature Sensor) sends the temperature reading of the compartment to the control board. Once the desired temperature has been set, the temperature display will return to the Actual Temperature display for both the fresh food and freezer. So I began to test things to try to test and diagnose the problem. How to Test Freezer Temperature Control. Data from the electronic sensors constantly measure the interior fresh food and freezer temperatures. After more research and testing I was able to diagnose the problem as the refrigerator evaporator temperature sensor / thermistor and most likely not related to the freezer at all. Note: This video is intended to give you the general idea of the part replacement procedure. If you notice your refrigerator is too warm, too cold, or not defrosting properly, then there may be a problem with your sensor.