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I have a ge side by side model # gss22jerebb , is not defrosting , reading other posts, its sounds like either the heater or thermistor, but need to know how to determine which one.

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Posted on Jan 02, 2017

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SOURCE: Refrigerator

Have looked at the schematics for this cabinet and am unsure as to the location of both defrost thermostats as unclear on drawings. The purpose of the defrost thermostat is to overide the heater and end the defrost cycle, once the temperature on the evaporator is high enough (normally around 0'C). If you have two then one will probably control the heaters going off and the other may well control the fan, for coming back on. I.E. once the defrost has ended the second sensor will tell the fan when the coil is cold enough to come on, this prevents heat being pushed into the main area after a defrost cycle. If you feel competent enough then I would bypass the heater thermostat temporarily and see if the heaters kick in. The other thing to check is that you have a resistance across the two ends of the defrost heater. In my experience the heater is the most likely to fail, the sensor sometimes fail and the timers rarely fail. The age of your cabinet would suggest the heaters. Please do not leave the sensor bypassed as it performs an essential role. Hope this helps.

Posted on Sep 05, 2007

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SOURCE: My GE fridge is not defrosting the coils in the back. What's up?

if u have frost build up in the freezer it will affect the temperature
and it needs to defrost
problems could be
defrost timer.
heater s.
unit problems (unlikely) if even frost coating.

Posted on Jun 16, 2009

  • 744 Answers

SOURCE: My freezer was developing frost / not cooling very good.

Hi, With the information you supplied i'm going to assume there is an ice build up at the rear of the freezer. Your problem is going to be with your defrost system. I will also assume you have the ability to repair this yourself. This is going to be one of three problems with your refridgerator, 1st thing to do is remove shelfs and panel in the back of the should see ice build up on the evaporator...don't worry get a hair dryer and melt the ice. Next locate the wires for the heater...using a multi meter test the heater for condinuity...if the heater is bad replace it, If the heater is good replace the defrost thermostat..the stat normally is a barrel looking part clipped onto the evaporator pipe. The last possible problem could be the evaporator fan, have you heard the fan running in the past few hours?..if you are not sure pull the panel out to where you can see fan and watch it over an hour to see if it turns. I have included links with pictures of what the parts you need to check are: defrost stat heaters evap fan. Hope this helps. If you have any other questions please feel free to comment again. If you decide to get a repair guy in should not cost you any more then $120 - $200 depending on make/model/problem Good luck! P.s Please don't forget to rate my solution Thanks! and thanks for using Fixya. Mike

Posted on Jul 29, 2009

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SOURCE: GE GSH25JFTA BB getting VERY warm on defrost

Good day,
Your machine should have a limit thermostat as well as the thermister. It may payto change it first before the motherboard.
It looks like this, mounted on the top of the coil.

If that fails, and the machine goes back to normal cooling until the next defrost cycle, I can think of nothing but the motherboard as the culprit.

Posted on May 29, 2010

  • 43501 Answers


This is a chronic problem with these...
It could be either of those...they are not that expensive, so it may be worth while to replace both...

Parts #240 and 241 here


Posted on Jul 08, 2011

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1 Answer

Compressor doesn't start when fridge is plugged in

The board or the cold control thermostat depending on model is bad. If it has a board, that Board most likely also controls defrost which may be why your coils are feeezing if Board is bad.

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Ge side by side frig won't defrost gss25sgmb new heater motherboard thermostats

Replace the thermistors #4 and #5 . 4 is the white bullet looking piece on top of the coils inside the freezer , with 2 white wires . 5 is at the bottom of the freezer , on the left side . These thermistors tell the main board , the temp and the board goes into defrost according to temp the thermistors "tell it " .

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GE model # GSS25JFPHWW looking for the defrost timer on this one is it behind the ice maker in the freezer

Defrost is controlled by the mother board, behind small rectangular panel on back of refrigerator. Part # WR55X10942 . (you can not use the board to manually defrost) If you are having a defrost problem, the most likely cause is the defrost heater (WR51X10055) and while you're at it, you might as well replace the defrost thermistor (WR55X10025) located at the top of the cooling coils. Manually defrost freezer by unloading freezer, removing shelves, and removing back panel inside freezer, then use hair dryer to melt frost. (you have to take those parts off anyway to get at the heater and thermistor)

Mar 31, 2011 | GE (PSS26MSRSS) Side by Side Refrigerator

1 Answer

All od the sudden my side by side ge artica keeps refridgeratoor at about 40 degrees and freezer at about 16 degrees

Open the freezer and look for frost buildup on the back panel. If you see frost, you have a defrost problem. Possible causes are the defrost heater or evaporator thermistor. You will need a multimeter to test the components. The heater should show continuity. The thermistor should be between 10k and 80k? at fridge to freezer temperatures. Anything less than that, the thermistor is bad. Remove the back panel of the freezer to access. The heater is mounted to the bottom of the evaporator coils. The evaporator thermistor is mounted to the top of the evaporator.

If no frost, I would suspect the freezer thermistor. It's at the left lower rear of the freezer or behind a grill on the right wall of the freezer. Same thing, if it reads less than 10k? replace it.

If all the components check good, the only thing left is the main control board. You can find this behind a panel on the back of the fridge.

Part numbers: Defrost heater WR51X10055, thermistor WR55X10025, Control board WR55X10942.

Mar 05, 2011 | GE PSI23MGM Side by Side Refrigerator

2 Answers

Ge model #gss201bpaww, fridge would not defrost, found a faulty heater, after a heater element and limit switch replacement still had a malfunction, replaced the control board but still does not defrost....

You are correct. The defrost thermostat (bi-metal) on these models should only read closed when cold. It should have no continuity when it is warmed above about 55 degrees. They also usually do not fail on these models.
Now if you have replaced the heater, the board and the bi-metal the only thing you have left to do to solve your issues is to replace the evaporator thermistor.
This is located top left on the evaporator coils and is actually what communicates to the control board the status of your coils. The part is relatively in expensive also. WR50X10027 is the part number.
Also Make sure you got part number WR50x10054 for your bi metal.
Good luck!!

Jun 13, 2010 | GE (PSS26MSRSS) Side by Side Refrigerator

1 Answer


There is no timer. The defrost cycle is calculated by the main board. If you have frost developing on back wall of freezer I would suspect the defrost heater or the defrost thermistor.

Feb 16, 2010 | GE GSS25SGMBS Side by Side Refrigerator

3 Answers

Freezer defrosting at will; refrigerator side uneven temperatures

Sound like it's going into showroom mode that the same problem we had, by unplugging it for awhile and then plugging it back in usually works if not this what we were told.
Sounds like you have bad thermistors ( # 4 and/or # 5 ) .To access these parts , you will have to remove the inside rear wall of the freezer . The # 4 thermistor , tells the main control board , the temp of the coils , if they need defrosted , when they are thru defrosting . This thermistor is the 1 " long , torpedo looking piece , clipped on the top left of the coils , with 2 white wires going to it . Part number WR55X10025 . It would be advisable to also replace the # 5 thermistor , located at the bottom of the freezer , slightly in front of the drain , also with 2 white wires going to it , slid into a housing . This thermistor , is the freezer thermistor , which tells the control board , the freezer temp , when to cycle off , associated with the fan speed also

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1 Answer

GE Model TFX20D not cooling!

Hi, If the defrost heater doesn't come on, check continuity on the bi-metal swtch located on the top of the evaporator coil. The bi-metal needs to be cold when testing it. If the switch is cold and shows an open circuit, it will need replaced. The bi-metal switch is a thermostat that turns the defrost heaters off when the desired tempurature is reached,.
Please let me know if this has helped you at all or if I can assist you further.


Jul 24, 2009 | GE (PSS26MSRSS) Side by Side Refrigerator

1 Answer

Fridge will not automatically defrost.

ls, your model has a main board that controls the defrost. The board is located on the back side. In the lower left hand corner of the board you will see a blue harness. The board will be marked comp, defr, line. You will need to get a jumper wire with clips and jump line to defrost. This will send 120V. to your defrost heaters. Then you can determine if the defrost heaters are in fact working. In most cases, I find the heaters at fault on these models. Not hard to replace. There is a evaporator thermistor that sends the signal to the board to defrost. Connector J-1 pin 4 to 5 should read 2.8 to 3.5VDC, dc voltage. Reading from left to right. You can ohm out the resister at those wires, should read 36.4K ohms at 5 degrees. The defrost terminator is redundant to the defrost operation. It's there as a safety device in the event the thermistor does not terminate the defrost. Check your heaters first. The defrost cycle is determined by compresser run time, door openings and time between defrosts. back

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