Author Topic: Replacing both evaporator fan motor and motherboard on GE SXS Refrigerators  (Read 13302 times)

Offline rickgburton

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REPLACING EVAPORATOR FAN MOTOR AND MOTHERBOARD ON GE SXS REFRIGERATORS

This is a rewrite of a thread I started in 2011 in an attempt to make it easier to understand how to determine whether the evaporator fan motor should also be replaced with the motherboard on GE refrigerators with failed motherboards.

Iíve had to replace both the variable speed DC evaporator fan motor along with main control boards or ďmotherboardsĒ on GE side by side refrigerators, mostly the GSS HSS and PSS 20-22-25-27 cubic ft. models with both metal and plastic liners. Iíve found around half of these board failures were partly due to a faulty/shorted DC evaporator fan motor.


Moisture gets inside the fan motor or thermistor thatís attached to the fan motor and causes shorts in the motor.


Replacing just the motherboard and not the fan motor will only result in another failed motherboard in a short amount of time.


To determine whether or not the fan motor should be replaced with the motherboard, first look at the two resistors below the J2 connector.
If they are burned or discolored you should replace the fan motor.


Remove the J2 connector and check the resistance in the harness between the J2-3 white wire and J2-8 red wire. There should be approximately 1.5K to 3.0K Ohms. If it reads open or shorted you should recheck it at the motor. If the readings are the same replace the fan motor.


On the mother board, check for 13 VDC between J2-3 and J2-8 and check for between 8-13 VDC between J2-3 and J2-4.
When no voltage is measured at the motherboard check for a short in the fan motor between the yellow and white wire and the red and white wire. A short in the fan motor will damage the motherboard.


If either of the following symptoms exists, freezer section thawing and refreezing, fan motor speed erratic or makes noise, or water stains and/or rust on the fan motor, then I would recommend you replace the fan motor.


While replacing the motherboard on GE refrigerators is common on all models, I have not seen this particular problem on top mount, bottom mount, french door, or inverter models.


Iíve marked the image and picture of a failed motherboard for easy reference.


rickgburton



GE Refrigerator Main Control Board Part # WR55X10942

Note: Due to manufacturer changes replacement board may appear different in configuration compared to the original.
Instructions are included with the replacement board.



GE Refrigerator Evaporator Fan Motor Part # WR60X10185
« Last Edit: May 09, 2012, 08:10:27 AM by rickgburton »
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Offline AJ

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Great information, awesome post!  O0
Hope you find our site helpful.

Offline rickgburton

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Thanks AJ! You should make it sticky.
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Offline AJ

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Thanks AJ! You should make it sticky.

Good idea, done.  O0
Hope you find our site helpful.

Offline go400

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Replacing the motherboard is probably not required if it is the new WR55X10942. To GE's credit,they isolated the sensitive drivers with relays.

Offline generaltech1

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Does this only apply to the SXS refers?

Offline go400

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It applies to any GE refigerator with the motherboard and 12 volt evaporator motor.

Offline generaltech1

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Just to be clear, would this apply to a "GTH22SBRARBS"? The board looks completely different but there are quite a few discolored resistors on the one that I'm currently getting ready to replace the motherboard.

Offline shillion

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Hello Rick,you have done a great job of illustrating the job to be done.I am sure many of us will learn a lot and save lots of frustrations and time and money.Thanks!

Offline rickgburton

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Anytime my friends! Here's some motherboard tech information for anyone that can use it. I just finished it and found one small mistake but corrected it. If any one sees any mistakes, please let me know. Thank you!
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Offline AJ

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Nice, great addition to a already awesome topic!  O0

Bet you spent a little time making them diagrams.

 :thanks:
Hope you find our site helpful.

Offline rickgburton

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Thank you! The original diagram was one page (1500x1500) but where ever I uploaded it to re-sized it and then you couldn't read the words. I originally started making diagrams for a friend of mine in the appliance business just starting out. I have a few more diagrams but they're designed more for the service tech than the DIY'er. I'll post a couple if I can figure out the secret handshake...LOL
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Offline rickgburton

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I have enough information and diagrams to make a Service Tech Reference or Quick Check handbook. I don't know if there's any interest for one though. Now days, unlike 27 years ago, there's more to remember. We went from 30 page service manuals to 300 page manuals and from simple voltage tests to enter the service diagnostic cycle or test mode. To this day, I still don't know how my VCR works..LOL
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Offline AJ

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Quote
I have a few more diagrams but they're designed more for the service tech than the DIY'er.

I think a lot of times the DIY'ers are not given enough credit. Got to remember a lot of DIY'ers maybe in similar trades as us and are able to read and understand our diagrams just fine and for the ones who can't we are more then happy to help.

Our appliance repair forum is a community of both tradesman and DIY'ers, people helping people. :)









Hope you find our site helpful.

Offline generaltech1

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Great diagrams there Rick! O0

 

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