Fridge Automatic Defrost Not Working

Since you cannot force the refrigerator into a defrost cycle on most models go ahead and unplug the refrigerator.

Fridge automatic defrost not working.

The defrost sensor fuse is not resettable if the defrost sensor fuse blows you must replace the defrost sensor. If the defrost sensor trips because it s not working correctly frost builds up on the evaporator fins eventually making the refrigerator and freezer not cool well. If you determine that your refrigerator has a defrost problem and it has an adaptive defrost system this section will help. When the defrost sensor trips it shut off power to the defrost heater.

To determine if the defrost sensor or fuse is defective use a multimeter to test both the sensor and fuse for continuity. The next thing you do is open up the freezer and see if that is still working properly. Assemble the timer back onto the fridge and reinstate the power supply. Several times a day the defrost heater turns on for a short period of time to melt the frost build up.

In this video from sears partsdirect we ll help you troubleshoot why your refrigerator s automatic defrost system isn t cooling including checking the electronic control board defrost heater thermistor and bi metal thermostat. If the defrost sensor fails to shut off the defrost heater the fuse will blow in order to shut off the defrost heater. If the defrost sensor fuse blows the defrost system will not work and the refrigerator will not defrost. Some refrigerators have a reset or trip switch that is not marked or indicated in any way.

Sometimes frost builds up to the point that it blocks airflow and the refrigerator stops cooling completely. The defrost heater tells the system when it is cold enough to start the defrost heater. It needs to be turned until the fan stops which means your fridge has reset the defrost button. You wake up in the morning and go to the refrigerator to get some breakfast.

If the refrigerator has a defrost problem the frost collected on the coils will not melt. Once you ve pinpointed the problem we ll show you how to fix it and get your refrigerator cooling again. You can use volt ohm meter to check the defrost sensor for continuity. The defrost sensor fuse is not resettable if the defrost sensor fuse blows you must replace the defrost sensor.

If the defrost heater does not work then the defrost heater will not start and the frost will start to build up. If possible check the defrost thermostat before the ice is melted. This video is just an example of what you might want to look for. When you get out the milk juice or whatever it is you get for breakfast you notice something is wrong.

To reset the refrigerator defrost timer tepte simply states to locate the circular notch on the timer and turn it counterclockwise with a flathead screwdriver.