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GE refrigerator not defrosting

Thanks for your response. I did check the defrost thermostat and I do have continuity. I would be interested in knowing how to force this unit into a defrost cycle. What do you think about the thermisters being bad would that keep the unit running all the time?

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To force this unit into a defrost mode, unplug the fridge and remove the cover from the main control broad and remove the main wire harness. (Three wires, Black, Blue and Brown I believe) Next take a a small 3in wire and bend it into a U shape to make a jumper.
GE refrigerator not defrosting - e4c0a32.jpg

Insert the jumper into the main wire harness to jump the to outer wires together. (Black to Brown) It should be pretty easy to slip it in through the back with the rest of the wires. (Don't worry this test will not cause any harm to your fridge)
Now reapply the power to the fridge and check the defrost heater. As long as the defrost thermostat is below 15 degrees then the heater should start working. If the heater doesn't work then there is a problem with either the defrost thermostat or the heater. GE uses a glass tube heater with a coiled wire inside. This wire has a habit of breaking after a few years.

As far as the thermistors go, all the do is tell the board to cool. They can make the unit cool all the time but the board should still defrost the evaporator every 6-36 hours. If the unit starts defrosting then you have a bad board.

Hope this helps and let me know if you need any clarification. Good Luck!

Posted on Nov 03, 2008


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