Question about GE Refrigerators

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Appears to go into an extended defrost cycle.

Refrigerator appears to go into an extended defrost cycle.
Freezer section heats up and defrosts everything in a short time, Melts all the ice . Un plugging it seems to reset it and allows to start to freeze again then a day later defrosted again. Did this about 3 weeks ago then worked ok until today and has defrosted everything again. Has electronic controls. top freezer

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  • bob_m_sherma Sep 19, 2009

    How do I get the defrost thermostat cover in the freezer off without breaking it? How do you gain access to the #4 & 5 thermistors? How to test thermistors?

  • bob_m_sherma Sep 21, 2009

    Very good. GE Model PTS25LHPARWW

  • bob_m_sherma Oct 20, 2009

    The thermistors fixed it. Thanks much.

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  • GE Master
  • 1,606 Answers

Sounds like your freezer has a bad defrost thermostat ( bimetal ) or bad #4 and/or #5 thermistor . This bimetal , has a high temp rating of 140 degrees , which means , when it gets to 140 behind the panel , it will cut off the defrost heater , to keep ice and food from thawing . The thermistors , tell the main control board the temps , and it decides when to restart the cooling process . I would check the thermistors by the digital controls , in the test mode , or have a technician check them for you .

Posted on Sep 12, 2009

Testimonial: "I would agree with this but how do I get the cover off the defrost thermostat with out breaking it. Also how do I get to the #4 & #5 thermistors? "

  • Mike Smith
    Mike Smith Sep 19, 2009

    I would need your model number to be able to help you more .

  • Mike Smith
    Mike Smith Sep 20, 2009

    To get to the bimetal and thermistors , remove the rear inside freezer panel (maybe 2 screws ) . The bimetal , is the 1" tall cylinder , clipped to the top of the coils , with a pink and blue wire going to it . The thermistor #4 , is the 1" long , white cylinder , with 2 white wires going to it , at the top left on the coils . The #5 thermistor , is at the bottom left , slightly foreward of the drain below the coils , slipped into a housing ( just pulls out ) , with 2 white wires going to it also .



    If the top of the bimetal , looks cockeyed , then this is the problem . The thermistors , best to just replace them . Same part number for both thermistors .

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Its the defrost problem.In your unit the defrost cycle is not running on time.This is the procedure of the unit.--- The compressor starts then it cools the freezer section. When the freezer reaches its cooling level the defrost cycle starts functioning. In this cycle the fan in the freezer section starts running and the cool air in the freezer section is passed to the fridge section and the fridge section gets cold. The air from freezer to fridge passes from the section, in that section the damper is located.In your case the freezer gets cold, after that defrost cycle has to start, but in your case the defrost cycle is not starting on time so over ice gets internally build and when defrost cycle starts, this ice melts and this gets leaks in the vegetable and under vegetable drawer.-------- Get the defrost timer, and defrost assembly parts checked and repaired by the technician.Repairing will solve the problem.You can get required parts from from online sites like: --- www.repairclinic.com or from searspartsdirect online site. --------- This should help.Thanks.Helpmech.

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Try manual defrost reset procedure: ----

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--------------------

The procedure of this unit is as follows: --- The compressor starts then it cools the freezer section. When the freezer reaches its cooling level the defrost cycle starts functioning. In this cycle the fan in the freezer section starts running and the cool air in the freezer section is passed to the refrigerator section and the refrigerator section gets cold. The air from freezer to refrigerator passes from the section, in that section the damper is located. Now this problem which you mentioned. In this problem the freezer thaws, this happens if the thermostat is not functioning or the heater is not heating. Then the ice starts getting collected on the evaporator coil. The evaporator coil is at the internal section of freezer. If too much ice gets collected then this ice blocks the fan in the freezer section from functioning and this blocks the damper section with ice getting collected there. This all procedure is controlled by the defrost board of the unit.

-----------------

So first try reset procedure.If that is not helping then defrost assembly parts are to be checked and replaced.The defrost thermostat is located in the freezer section beside the evaporator coil.The defrost heater is located in the freezer section beside the evaporator coil.And the defrost control board is located in the fridge section.-------------

you can get the required parts from online sites like:---

www.repairclinic.com or from searspartsdirect online site.---------This will help.Thanks.Helpmech.

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