Question about GE Refrigerators

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Defrost not working

I recently replaced my defrost heaters because I was getting ice build up on the coils. One of the heaters was broken. when I replaced them, and try to cycle through the defrost cycle manually, they still never heat up. What else could be wrong?

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  • GE Master
  • 4,654 Answers

It could be caused by a defective defrost thermostat or a bad connection in the wiring going to the defrost heater. What is your model number? Thanks Sea Breeze

Posted on May 10, 2013

Testimonial: "It is a GE TFX27PFSB WW. Is the termostat the little round part that has 2 wires that attach to the top of the top heater? The new heater assy came with a new thermostat, unless that isn't the thermostat. "

  • John Tripp
    John Tripp May 14, 2013

    I did not get word that you made a comment. Sorry. Yes that is the defrost thermostat. Have you changed the WR9X489 Defrost Control?http://www.repairclinic.com/PartDetail/D...

  • John Tripp
    John Tripp May 14, 2013

    The defrost control is location 257 in this photo here=> https://www.pcappliancerepair.com/model....

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Posted on Jan 02, 2017

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tborn6
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SOURCE: Evaporator coil frosted up on Samsung RS267LABP Refrig side

TAKE AND DISCONNECT THE POWER TO TH UNIT AND ON THE VERY BACK THERE IS A CONTROL BOARD THE IS UNDERNEITH A WHITE PLASTIC COVER THAT YOU WILL HAVE TO REMOVE THEN DISCONNECT AND RECONNECT THE WIRES TO THE CONTROL BOARD AND SEE IF THAT DOESTHE TRICK.

Posted on Mar 07, 2009

  • 64 Answers

SOURCE: Need photo of Defrost Switch or Sensor

moz-screenshot.jpg34f1f3f.jpg
Unit needs to be cold when you test. it closes at around 20 or 30 degrees F and opens around 55 deg F

Posted on Jul 02, 2009

aasc
  • 1606 Answers

SOURCE: I have a Hotpoint HSS25IFMD WW sise by side

A thermistor is a 2" torpedo looking piece with 2 wires attached to it . The defrost bimetal , a 1" round aluminum piece , snapped onto the coils , with 2 wires , should be replaced when replaceing the heater . This bimetal could be the problem . To test the defrost system , remove the main control board cover . The blue plug with 3 wires to it needs to be connected . Looking at the plug , the wireing will look like this : l l l . Lets call the terminals 1 2 3 . Useing a piece of insulated wire with both ends stripped , insert one end into terminal 2 and the other end into terminal 3 . The heater will come on if both the heater AND bimetal are good . If you put a new heater in and it wont come on , and you do this test , then the bimetal has to be bad . If your terminology is correct , you have 2 thermisters in the freezer . One on top of the coils ( evaporator sensor ) and one at the bottom by the drain pan ( freezer temp sensor ) . Wouldn't hurt to replace both if you replaced one .

Posted on Aug 08, 2009

woodchuck789
  • 4070 Answers

SOURCE: automatic defrost not working, but manual is?

Yes if the heater and defrost thermostat are good then the problem is the control board.

Posted on Sep 04, 2009

hvac1960
  • 2133 Answers

SOURCE: DEFROST CYCLE IN FREEZER NOT WORKING PROPERLY

1. Check defrost timer. 2. Check defrost thermostat. 3. Check defrost heater. One of this are more than one may be defective replace.
First, locate the defrost timer which may hiddenbehind corners of the fridge at the back bottom, in some models located in theceiling of the fresh food section or behind the cold control cover. Once youlocate the defrost timer, slowly turn the screw in the middle of the defrosttimer with straight screwdriver until the fridge shuts off. Now it's indefrost. If the defrost heater(s) starts, replace the defrost timer and defrostthermostat. If the heater(s) does not start, unplug wire cord to check ohm testfor continuity of heater. If continuity is there, plug cord wire which givespower 120volts (check specification) to heater. If heater no starts, bypassdefrost thermostat by join the 2 wires in the defrost thermostat. If the heaternow comes on, replace the defrost timer and defrost thermostat. If the heateritself is bad, replace it. Thanks and hope helpful

Posted on Jan 29, 2011

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