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Forum Index => Refrigerator & Freezer Repair => Topic started by: rickgburton on May 09, 2012, 08:08:27 AM

Title: Replacing both evaporator fan motor and motherboard on GE SXS Refrigerators
Post by: rickgburton on May 09, 2012, 08:08:27 AM
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
Title: Re: Replacing both evaporator fan motor and motherboard on GE SXS Refrigerators
Post by: AJ on May 09, 2012, 08:13:48 AM
Great information, awesome post!  O0
Title: Re: Replacing both evaporator fan motor and motherboard on GE SXS Refrigerators
Post by: rickgburton on May 11, 2012, 08:23:19 AM
Thanks AJ! You should make it sticky.
Title: Re: Replacing both evaporator fan motor and motherboard on GE SXS Refrigerators
Post by: AJ on May 11, 2012, 08:24:40 AM
Thanks AJ! You should make it sticky.

Good idea, done.  O0
Title: Re: Replacing both evaporator fan motor and motherboard on GE SXS Refrigerators
Post by: go400 on March 04, 2013, 11:20:51 AM
Replacing the motherboard is probably not required if it is the new WR55X10942 (http://click.linksynergy.com/fs-bin/click?id=omv7WULuxaw&subid=0&offerid=225193.1&type=10&tmpid=2111&RD_PARM0=http%253A%252F%252Fwww.appliancepartspros.com%252Fge-main-control-board-wr55x10942-ap4436216.html&RD_PARM1=http&RD_PARM2=%253A%252F%252Fwww.appliancepartspros&RD_PARM3=.com%252Fge-main-control-board-wr55x10942-ap4436216.html). To GE's credit,they isolated the sensitive drivers with relays.
Title: Re: Replacing both evaporator fan motor and motherboard on GE SXS Refrigerators
Post by: generaltech1 on March 07, 2013, 08:34:08 PM
Does this only apply to the SXS refers?
Title: Re: Replacing both evaporator fan motor and motherboard on GE SXS Refrigerators
Post by: go400 on March 08, 2013, 03:31:35 AM
It applies to any GE refigerator with the motherboard and 12 volt evaporator motor.
Title: Re: Replacing both evaporator fan motor and motherboard on GE SXS Refrigerators
Post by: generaltech1 on March 12, 2013, 01:44:35 PM
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.
Title: Re: Replacing both evaporator fan motor and motherboard on GE SXS Refrigerators
Post by: shillion on March 12, 2013, 04:22:00 PM
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!
Title: Re: Replacing both evaporator fan motor and motherboard on GE SXS Refrigerators
Post by: rickgburton on March 26, 2013, 06:59:17 AM
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!
Title: Re: Replacing both evaporator fan motor and motherboard on GE SXS Refrigerators
Post by: AJ on March 26, 2013, 07:16:58 AM
Nice, great addition to a already awesome topic!  O0

Bet you spent a little time making them diagrams.

 :thanks:
Title: Re: Replacing both evaporator fan motor and motherboard on GE SXS Refrigerators
Post by: rickgburton on March 26, 2013, 08:17:49 AM
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
Title: Re: Replacing both evaporator fan motor and motherboard on GE SXS Refrigerators
Post by: rickgburton on March 26, 2013, 08:30:18 AM
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
Title: Re: Replacing both evaporator fan motor and motherboard on GE SXS Refrigerators
Post by: AJ on March 26, 2013, 08:47:19 AM
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. :)









Title: Re: Replacing both evaporator fan motor and motherboard on GE SXS Refrigerators
Post by: generaltech1 on March 27, 2013, 02:04:06 PM
Great diagrams there Rick! O0
Title: Re: Replacing both evaporator fan motor and motherboard on GE SXS Refrigerators
Post by: rickgburton on March 27, 2013, 02:31:13 PM
Thanks, and since I'm still in the refrigerator forum, here's a couple more I made on using the touch method to diagnose sealed system issues. This is old school but it worked great for me and doesn't take very long to become quite accurate using it.

Title: Re: Replacing both evaporator fan motor and motherboard on GE SXS Refrigerators
Post by: AJ on March 28, 2013, 08:19:03 AM
Nice, you need to start writing a book for us.  O0
Title: Re: Replacing both evaporator fan motor and motherboard on GE SXS Refrigerators
Post by: ZZZ on July 07, 2013, 10:47:03 PM
Great diagrams there Rick! O0
Ditto that.
Title: Re: Replacing both evaporator fan motor and motherboard on GE SXS Refrigerators
Post by: archibald tuttle on July 11, 2013, 08:03:07 AM
Rick and company,

I too wish to thank you for the diagram which ought to be pasted to the back of every one of these fridges.

Two questions on these GE SxS.  How can you tell if you have the new board.  assume the relay might be obvious or . . .  date code or?

I've been through two boards in two years on one of these SxS and now its down again.  seems like defrost symptoms but could be evap fan, i.e. freezer is refrigerator, refrigerator is oven . . .

fixyourboard.com has a pretty good logic schematic for the defrost circuit
http://www.fixyourboard.com/techzone/refrigerators/ge_fridge_nodefrost/defrostflow.html
but calls for ohming the "bimetal switch".  i don't thing these have bimetal switches. I thought they have thermistors which vary resistance with temperature.  maybe they are still bimetal, and maybe the reading they are looking for - under 10 ohms - indicates a range, e.g. 0 to 10 that is within appropriate operating characteristics.

first problem is, identifying the "bimetal switch" which I assume from your diagram is the evaporator thermistor which is also used to terminate the defrost cycle. (I'm a little hazy on that terminology relative to good old analog defrost operation because the defrost cycle was operated by a timer and the bimetal switch turned the element on and off to prevent overheating during that timed cycle but did not terminate the cycle.)  Assuming I have the right thing to test you show ohming J1 pin 5 to J1 pin 4 and then I'd refer to the thermistor values to see if the ohms vaguely correspond to current evap temp.  One thing not mentioned, is such a test reliable if the junction is still plugged in? if so, maybe this is a slight advantage to the PC board control as in most analog versions you had to unplug everything and test it on its own - although that also highly logically confirmed what was working and what wasn't.  no black box to deal with.

And , I'm still black box as to whether the new and disimproved model responds to the thermister by reentering refrigeration mode or it simply turns off heater and the processor is running a timer (and if all this utter nonsense overcomplicating fridges in order to cost people money and grief is actually aimed at some miniscule energy savings and I can blame this whole disaster on EPA -  who are pretty much singlehandedly responsible for most problems I encounter in life - you'd think they would have a relative humidity sensor as well to change the cycle timing rather than a knife edge algorithm of how fast the evap warms but maybe that is a reasonable surrogate for it being iced out and I'm only complicating what is already too complicated, but I digress).

As to the evap fan, I'm not clear what the real benefits are of two or three speed operation.  you list 12V high 8 V for low although then I see a listing of 4V low, 8V med, 12V high. I've generally found good ole fashioned AC evap fans to be virtually bomb proof.  I'll come across them completely iced up or gummed up with locked rotor.  clean em up, little lube on the shaft and back in business.  water don't hurt 'em, ice don't hurt 'em, food gunk don't hurt 'em.

If I read your first diagram right, after observing resistor condition and checking for open or short condition J2 pin 3 to J2 pin 8 and then following up at motor if either is observed, I would test for voltage between J2 pin 3 and J2 pin 4 during operation.  And if I'm not getting voltage at all to J2 pin 8 this is an indication of damage to the board possibly resulting from some misoperation or misapprehension of the evap fan.  Now, you say this should be less likely with new boards because of relay style operation, although I'm wondering if these guys every heard of a fuse.  We used to used those to protect DC control circuits as well as mains, just sayin . . . 

I guess in the bigger picture while I'm thanking you for your extensive work to help crack the black box a little bit -  what is the point.  I've got plenty of work without these headaches.  I suppose if we are trying to cure unemployment by turning 30 million more people into appliance repairmen it would be more efficient to keep writing unemployment checks and not have all our food spoil - maybe that explains the increase in food stamps.

Maybe I can ask if there is another thread to discuss what manufacturers have actually got this figured out best and will move the the bottom of this post there, but can't avoid asking when I'm on the 3rd go round in 3 years for this fridge whether there are better options. Can I still buy an analog controlled fridge or one with minimal printed circuit work, or small circuits devoted just to the icemaker for instance which have been prevalent for years but if the icemaker goes, you don't lose all you food.

I will certainly plead guilty to not having cracked the depths of the problems the way that rick has and maybe once you really understand a board, the GE isn't any worse than anybody else's - or perish the thought, maybe it is better.  (although fixyourboard.com also identifies their 13.5 volt power supply as fluky.
  http://www.fixyourboard.com/techzone/refrigerators/ge_fridge_testload/ge_fridge_testload.html.
don't know if they fixed that on the 'new' versions.)

and fixyourboard warranties their repairs for 2 years which is nice but to me the gold standard is 22 years not 2 years.  I've got an analog SxS Estate brand (think I once figured out it is a whirlpool but not sure) fridge I bought from Sam's club 22 years ago for 500 bucks and done nothing but clean the condenser grid a couple times prophylactically.

if there is a modern manufacturer who can take those guts and wrap some stainless steel around 'em and sell 'em for a grand they'd be in the money from my perspective.  I'd tell everybody I know to buy one.

And I'm now faced with the decision whether to fix this GE again (maybe better than I did before by buying a new board without really knowing why the old one failed, maybe Rick's work will help me to know why it failed) or to throw in the towel and choose another manufacturer or different GE control strategy because counter-depth would be better in this setting anyway. If so, what manufacturer should I choose?

if you made it to the end of this post you were able to suspend the ADD that has you being an independent entrepeneurial serivce person (e.g., for extreme example see my screen name) long enough in favor of ARD - (i.e the retentive disorder) when it comes to appliance repair. thanx for playing. thanks for any service ideas and any observations on brands which seem to have more analog or better worked out or separated digital control regimens.

brian

aka- the man who refuses to buy a washing machine with a digital main controller.



Title: Re: Replacing both evaporator fan motor and motherboard on GE SXS Refrigerators
Post by: ZZZ on July 11, 2013, 09:55:25 AM
Rick and company,

I too wish to thank you for the diagram which ought to be pasted to the back of every one of these fridges.

Two questions on these GE SxS.  How can you tell if you have the new board.  assume the relay might be obvious or . . .  date code or? .....

/quote]
The bimetal is made by TOD and is an L140-30, if memory serves me right.  This means it will open at 140 deg. F. and close at 30 deg. F.  To test one, cut the leads and remove.  Cut the leads about an inch from the bimetal because you will have to reinstall it with very little extra wire slack).  A new one comes with long leads.  The connectors must be sealed with RTV silicone I to keep moisture out of connector. Heat shrink or tape will not be sufficient.

 Tape the thermocouple from your temperature meter to the side and clip your ohmmeter to the leads.  Put some water in a pan on the stove and heat to 160 degrees. Place in water, the device should open when the meter indicates 140 + or - 5.  Then move it to a working freezer, it should close at 30 + or - 5.  Do this four or five times to be sure. It will not have a variable resistance, it will be zero or infinity. Or, you can just buy a new one for $9.00.   Here is a link to TOD, they make most of the bimetals out there:
http://www.thermodisc.com/en-US/Products/Bimetal/Pages/39T.aspx (http://www.thermodisc.com/en-US/Products/Bimetal/Pages/39T.aspx)
You did not state how your boards are failing, that would be the best indicator of what is going on.  Do you have a surge protector on your electric service or refrigerator outlet.  I would invest in a good one for the panel as voltage spikes (dute to lightning and utility switching) are the number one killer of boards in A/C, furnaces, washers, audio and video equipment, and refrigerators.  The newer style board has the two resistors in Rick's photo in a different location from the older boards.  There is no date codes on most boards. 
Title: Re: Replacing both evaporator fan motor and motherboard on GE SXS Refrigerators
Post by: archibald tuttle on July 11, 2013, 11:45:35 AM
OK, so the thermistor that rick's diagram says terminates defrost is not the same control as the bimetal?  I may have missed it in the diagram but I don't see other leads coming back from this bimetal sensor to the board.  or is it just in series with the Def terminal on the AC side rather than the DC control circuit.

and thanks for tip to look at location of resistors to identify different board.

there was definitely something cooked on the original board when I changed it and I left it sitting on my bench for 2 years in the box from the replacement board but can i find it today . . . nooooooo.

I didn't do the second replacement.

I think this thread was just starting up back then when I did the first and wish I had found it then because I would have had a better chance of tracing the cause.

Yes I understand power spikes are a problem generally although not really a believer that current surge technology can quench lightening level problems without damage to sensitive electronics although I think instability and switching on the grid can be controlled for. 

But no other damage to electronics in this building and it returns me to my concern about having this stuff digitally controlled to begin with.

thanks, headed over there to have a look right now. Might have a little more info next time I post.

Title: Re: Replacing both evaporator fan motor and motherboard on GE SXS Refrigerators
Post by: Spannerwrench on July 11, 2013, 01:30:17 PM
The evaporator thermistor controls when the unit comes out of defrost, unlock most refrigerators it is not controlled by the TOD, the TOD is used only as liner protection.  If the thermistor fails that's a safety device.
Title: Re: Replacing both evaporator fan motor and motherboard on GE SXS Refrigerators
Post by: ZZZ on July 11, 2013, 02:58:41 PM
The TOD is a line voltage device used as an over-temperature limit.  It is wired in series with the defrost heater.  The door openings, evaporator thermisters, compressor run-time, are all inputs to the adaptive defrost system which initiates and terminates the defrost cycle. The TOD is a safety to keep from having the heater run wild if something fails in the control circuit, nothing more.
I retired as Electrical Foreman at a University with over thirty million dollars of equipment in the Public Television and Public Radio studios and another twenty million dollars worth of stand alone electronic equipment.  I can assure you that surge suppression works very well.  Obviously, the better it is the more expensive it is. But even the cheap ones are a thousand times better than nothing at all.
Sq-D and GE and other panel manufacturers make residential surge suppressors for their breaker panels.  They cost under $200 installed, and come with a $50,000 warranty.  As an electrical contractor in an area with a lot of lightning, I sell a  lot of them.  We tell the customers to contact us if they have any failures during a thunder storm or power outage and we will file the claim.  In 9 years we have yet to have a complaint.  They work.
 
Title: Re: Replacing both evaporator fan motor and motherboard on GE SXS Refrigerators
Post by: ZZZ on July 11, 2013, 03:07:50 PM
Sorry, I got side tracked on my last post.  I forgot to ask:  On the two previoius board replacements was it due to a problem with the evap not defrosting, did you replace the board only (no other parts), and did it fix the problem?
Title: Re: Replacing both evaporator fan motor and motherboard on GE SXS Refrigerators
Post by: archibald tuttle on July 11, 2013, 04:26:03 PM
yes, first time it was defrost problem.  remember that there was some obvious damage to the board and I saved the board but as I said, no can find.

I'm wondering where to look for the onboard wiring diagram on these GE SxS units. I haven't been able to find one, which would have answered my question about the bimetal.

so this is definitely a defrost episode we're having here and not evap fan problem .  just saw the fridge.  aside from the obvious ice build up in the back of the freeze, getting 13.5 volts J2 pins 3-8 and 12.5 volts J2 pins 3 -4.

I moved the remaining food to another fridge and I'm letting it defrost tonite so I can get at the evaporater, but I'm a little confused as to which two legs I should be ohming at the board to test the defrost circuit itself because the connector that supplies the defrosters and compressor alternatively has a line input and the neutral appears to go to the next connector over. so I don't see any neutral wire to the defrost cycle to ohm against the line out from the 3 pin connector.

board looks fine.  no obvious damage or discoloration. maybe it's not the board this time.

but I'm getting infinite ohms across J1 4 to5  which is the evaporater thermister, as well ass across 5 to all the other thermisters which is what is shown in Rick's diagram.  I'm wondering if my J1 could be wired differently. and that gets me back to looking for a wiring schematic with color codes.  I definitely have the WRX5510942 board that's being dealt with here but can't find a serial number on the fridge.  I think it may have been one of those 'refurbs' so unless there is an onboard schematic I'm going to have to find likely model numbers and search for a diagram until I find the one that works.

thanks for playing along, more bulletins as events warrant.

brian
Title: Re: Replacing both evaporator fan motor and motherboard on GE SXS Refrigerators
Post by: ZZZ on July 11, 2013, 06:04:06 PM
The resistance will vary inversely with the temperature.  At 68 deg F. you will have 6200 ohms; at 32 deg F you will have 16,300 ohms. Of course the plug must be disconnected from the board.   Not all meters will read this correctly.  Buy some similar resistors at Radio Shack and check your meter.  The serial should on the foil nameplate in the upper right side of the refrigerator section. Save this pdf before it's gone:  http://www.applianceaid.com/pictools/gefridge1.pdf (http://www.applianceaid.com/pictools/gefridge1.pdf)
Title: Re: Replacing both evaporator fan motor and motherboard on GE SXS Refrigerators
Post by: archibald tuttle on July 12, 2013, 06:28:45 PM
OK been in the cabinet today and this has an aftermarket L45-15 bimetal that sits at the very top of the evaporator.  seems a little on the cold side. but even the originals are usually labeled so don't figure the guy who was in here last year would have gone too far awol but does anyone know the normal design temps.

anyway, this one ain't easy to trigger so it ain't easy to reclose the switch by dipping in ice water at a 15 setting.  I put it all back together and run for a couple hours and it still hasn't closed assuming I'm ohming the right wires.  i'm pulling the plugs on the 120 end of the board and testing the orange wire that Rick has labeled neutral on the exteme left hand end of the bigger connector to the blue wire at the center of the 3 pin comp/defrost plug.  these wire color codes check out inside the box.

if it isn't reset by tomorrow I'll cut it out and join the wires to make sure I'm testing the right ones and then get another.  and i'll get on to seeing if the adaptive defrost seems to be working.

I don't find any way to trigger the card via the controls (no digital controls or address to the card on this one, only a typical temperature dial).

I suppose from reading the description I could open and close the door a bunch of times but I'm not clear that even a lot of that would trigger the defrost without time.

This was some kind of leftover or warranty return fridge because the serial/model number sticker was removed.  I can see the glue mark where it was upper right side of the fridge box.

I don't find anything on the back that indicates a model number and haven't located a wiring diagram.  don't know where you look on these.  I tried looking for an envelope behind the front and back bottom covers, or one glued onto the back cover but no dice.

I did pull the J1 connector when I was getting infinite ohms across the evap thermister but I maybe should have jumped a range or two on the meter.

It was room temp in the box at that time and I think I was on the 2K range and that should have read around 6400 or less according to the stock figures, but maybe it still shows infinite if the ohms are higher than the range.  may be my bad on that one.  I'll recheck next visit.

They already got another fridge going and I'm just taking this slow and a step at a time.  it's right near other jobs and I want to go step by step and help them decide whether to keep fixing this or switch.  There is counterdepth frigidaire SxS I can bring in but wonder if that is a good choice or frying pan into fire.

or if not frigidaire whose are most bombproof, easy to diagnose, more modularly replaceable control strategy or . . .

brian





Title: Re: Replacing both evaporator fan motor and motherboard on GE SXS Refrigerators
Post by: clman on December 29, 2013, 01:53:35 AM
Seen the exact same issue with LG french door models. They issued service bulletins on it and upgraded fan motors.
Title: Re: Replacing both evaporator fan motor and motherboard on GE SXS Refrigerators
Post by: olyteddy on September 13, 2014, 09:07:26 PM
You just might be able to get the parts for free...I do:
Title: Re: Replacing both evaporator fan motor and motherboard on GE SXS Refrigerators
Post by: Patricio on September 14, 2014, 11:15:13 AM
That letter is dated November 07, 2006.  You are saying they still are warranting the board almost 8 years later?   Also I have not seen this issue in quite a while.
Title: Re: Replacing both evaporator fan motor and motherboard on GE SXS Refrigerators
Post by: olyteddy on September 14, 2014, 10:22:26 PM
I probably have a hundred fridges that are still on that list. My GE rep sends me boards just on an e-mail.
Title: Re: Replacing both evaporator fan motor and motherboard on GE SXS Refrigerators
Post by: jamenlang on April 24, 2015, 05:17:07 PM
My city has a city-wide trash pickup day where people haul things to the curb and the city comes and picks it up to haul off to the dump. I discovered an abandoned partially parted out a GE refrigerator. Someone took the doors, but I got the auger, auger motor, ice maker/feeler assembly and ice container, door switches, temperature control knobs, solenoids and motherboard.

I'm glad to have found schematics for wiring the motherboard to the motors for use in other projects, but I don't see much for inputs aside from J4. how can I activate the relays for k1 k2 and k3 without the (now missing) door panel?
Title: Re: Replacing both evaporator fan motor and motherboard on GE SXS Refrigerators
Post by: jwright64119 on October 07, 2015, 10:50:29 AM
I have this control board and I have found my problem. The connector j8(compressor) burned up just after the connection on the board. Where does the j8 connect on the board?
Title: Re: Replacing both evaporator fan motor and motherboard on GE SXS Refrigerators
Post by: marlonthomas on June 28, 2016, 12:15:16 AM
Great idea, excellent post!   :)
Title: Re: Replacing both evaporator fan motor and motherboard on GE SXS Refrigerators
Post by: ameritech on February 18, 2017, 10:28:38 AM
Thanks for the heads up!
Title: Re: Replacing both evaporator fan motor and motherboard on GE SXS Refrigerators
Post by: bnklally on June 04, 2017, 06:12:49 AM
Rick, can you please give me advice on my fridge?

I have a PFE28RSHCSS.  It is a bottom freezer, french door GE profile fridge and it is only a year and a half old.
The bottom freezer works fine, but the fridge is warm.  There was also water and ice in the deli drawer.  I replaced the thermister and the defrost thermometer and it still didn't fix it.

I then noticed that both fans; the deli fresh food fan and the (i think its called) evaporator fan, in the main fridge compartment are not working.  I checked the circuit board and the resisters look fine.

Would you recommend that I change both fans and the circuit board?
side note- we did have some power outages here about a week prior.  I wonder if something got messed up with the power coming on and off.
Title: Re: Replacing both evaporator fan motor and motherboard on GE SXS Refrigerators
Post by: olyteddy on June 08, 2017, 09:32:10 PM
Rick, can you please give me advice on my fridge?

I have a PFE28RSHCSS.  It is a bottom freezer, french door GE profile fridge and it is only a year and a half old.
The bottom freezer works fine, but the fridge is warm.  There was also water and ice in the deli drawer.  I replaced the thermister and the defrost thermometer and it still didn't fix it.

I then noticed that both fans; the deli fresh food fan and the (i think its called) evaporator fan, in the main fridge compartment are not working.  I checked the circuit board and the resisters look fine.

Would you recommend that I change both fans and the circuit board?
side note- we did have some power outages here about a week prior.  I wonder if something got messed up with the power coming on and off.
I'd get warranty service on it. Here's a thread that details your problem: http://appliancejunk.com/forums/index.php?topic=20346.0
Title: Re: Replacing both evaporator fan motor and motherboard on GE SXS Refrigerators
Post by: bnklally on June 09, 2017, 06:19:29 AM
I ended up doing a software update and replacing the FF fan.  Works now!
Title: Re: Replacing both evaporator fan motor and motherboard on GE SXS Refrigerators
Post by: Joselito on June 19, 2017, 06:24:04 PM
REPLACING EVAPORATOR FAN MOTOR AND MOTHERBOARD ON GE SXS REFRIGERATORS

Does this apply also to condenser fan motor I have one that the fan do not work !!!!!!!!?????????



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