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Thread: defrost timer

  1. #1

    defrost timer

    Model Number: gsh25jsta ss
    Brand: GE
    Age: 6-10 years

    Quick question, where is the defrost timer located in this model?

  2. #2
    Admin/Technician Doc Ryan's Avatar
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    Your model refrigerator does not use a defrost timer. The main control board on the back of the refrigerator takes the place of the defrost timer.

    This is the control board for your model:

    Main Control Board - Part # PD00000994 (mfg # WR55X10942)
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  3. #3
    OK, thanks. I'm running out of ideas here. The freezer works fine, but the refrigerator jumps to 50 degrees. I've replaced the board and the thermostat in the freezer. When the fridge temp jumps up, I have to remove the back panel in the freezer and manually defrost all the coils as a large amount of frost covers them. After that the fridge is good for about two weeks. I was under the impression it was either the thermostat, defrost timer or heater. Could this be the result of a faulty heater?

  4. #4
    Admin/Technician Doc Ryan's Avatar
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    There is also a defrost thermistor temperature sensor on the evaporator coil that is common to fail. Many people overlook this part, and it is common to go bad.

    Temperature Sensor (Thermistor) - Part # PD00000992 (mfg # WR55X10025)
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  5. #5
    I'm going to order this from you guys and see if that works. Is it difficult to replace? What should I look for as far as replacing the old one?

  6. #6
    Admin/Technician Doc Ryan's Avatar
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    It is easy to replace.

    Unplug the refrigerator
    Remove the back panel in the freezer
    Locate defrost sensor clipped to the top left of the evaporator coil
    Cut wires to the old sensor
    Splice the wires of the new sensor using a good method (IE: good quality crimp connection, or solder and heat shrink)
    Reassemble in the reverse order


    Let me know how it works with the new sensor installed.
    Ryan

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