Defrost Temperature Sensor Test

There is a lot of misinformation on testing the defrost thermostat.

Defrost temperature sensor test.

The sensor shown in the video is part da32 10104n pd pd00026468 b. The defrost thermostat a bi metallic switch controls the temperature rise in the freezer compartment during the defrost cycle. A thermistor changes resistance based on the temperature it is exposed to. You can purchase one from amazon by clicking this link.

In order to test you can measure the ambient temperature make the sensor is removed and acclimated measure the ohms of resistance and compare to the manufacturer chart. If your defrost heater has a defrost thermostat wired in series like mine you ll need to make sure the thermostat has cooled down below its closing temperature before doing the ohm test. A defrost sensor is generally a thermistor. Also see how to check the wires that connect the thermistor to the electronic control board to make sure the problem isn t with the wiring or the.

This video from sears partsdirect shows how to troubleshoot problems with your refrigerator s thermistor or temperature sensor if your refrigerator is not cooling at the right temperature. This video shows the proper way to test your defrost thermostat. If you find that you have a bad defrost heater and you need to purchase a new one.