Need appliance parts? Call 877-803-7957 now or use the parts search box:

Parts Search

Learn appliance repair at online the Master Samurai Tech Academy.  Learn more.  Earn more.

FAQs | Repair Videos | Academy | Newsletter | Podcast | Contact

TonyMS21

LG Fridge LFX28978ST /01 Problems

7 posts in this topic

My LG fridge stopped cooling the same day we had a whole house generator installed (I don't think the two are related).  No problem we had a extended warranty and after some calling around to Home Depot they finally got some out in two weeks.  They said the mainboard was bad and ordered the part and scheduled another appointment 2 weeks out.  Home Depot called me said something was back ordered so they sent me a check for the replacement and the food loss and washed their hands of the problem.  Part came to my house so I replaced it myself and powered it on it went thru its cycle a blew the same area on the board.  I ordered another board put it in and left that connection unplugged and it is working with no error codes.  The ice maker isn't working and there is no water out the front.  Sounds like water should come out but nothing does and the test button in the ice maker makes the ice tray move thru its cycle.  I have the service manual from this site but can't seem to find where those connections go.  I had another local guy out he said it was the display board which I believe he was referring to the sub board behind the water/ice area but he flaked out and just got my money back from them.  Anyone else have this problem?  To recap the fridge cools top and bottom perfectly and there is no error codes there is no ice/or water and I don't want to hook that connection up since I haven't found the cause of the problem.

 

IMG_4193.jpg

Share this post


Link to post
Share on other sites

Need appliance parts? Call 877-803-7957 now!

Inspect the wiring at the hinge---on the left side refrigerator door.

 

If the doors were removed---to allow delivery into home---it's not uncommon to find a damaged wire.

 

It's possible that---a wire is grounded/shorted---under the hinge (from re-installing the doors).

2 people like this

Share this post


Link to post
Share on other sites

Had an LG side by side two weeks ago.  Power surge took out the Main PCB (similar damage to the ribbon circuit).  Customer ordered and installed a new Main PCB.  Interior lights worked but no display and no voltage to the compressor or fans.  I had to replace the Main PCB again along with the display PCB (interface) to correct the problem.

1 person likes this

Share this post


Link to post
Share on other sites

When you say Display board are you referring to long rectangular board with the buttons and the 2 two digit displays or the smaller board in the same area.  In the service manual it refers to that one as the sub pcb.

Share this post


Link to post
Share on other sites

In the instance of the side by side, it was the long display board, and that model didn't have the Sub PCB for the auger motor as your model does.  Heed the wisdom of Brother john and inspect the wiring harness at the door.  Difficult to say if there's any correlation between power disruptions from the generator installation and failure of the refrigerator.

Share this post


Link to post
Share on other sites

Grab an ohm meter and ohm each wire in the disconnected harness to ground. Based on the damage, it looks like the pillar heater circuit is shorted to ground.

1 person likes this

Share this post


Link to post
Share on other sites

I checked the harness at the left hinge everything looks fine I should check the right too.  Thanks for the ohm each wire suggestion I didn't think of that.  The circuit with the damage is listed as pilar htr which for what I understand is in the doors and keeps them from sweating.  I just want the water and ice maker to work again if it is the pilar htr and they are in the door how in the world do you get to them. 

Share this post


Link to post
Share on other sites