Jump to content



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


Parts Search
Site Search

FAQs | Store | Memberships | Repair Videos | Academy | Newsletter | Beer Fund | Contact


Welcome to Appliantology.org, the Web's Premiere Appliance Repair Resource!

The world-famous Samurai Appliance Repair Forums


To get started, click here.


Already a member of the Appliantology Academy? Just sign in with your username and password in the upper right-hand corner of the screen.

 


Photo

LG Top-Load Washer WT4801CW: DOA and lid lock stuck

LG washer top load

  • Please log in to reply
6 replies to this topic

#1 Samurai Appliance Repair Man

Samurai Appliance Repair Man

    Shōgun

  • Master Samurai Tech
  • 29,808 posts
  • Location: USA
  • Flavorite Brew:Sapporo Original Draft Rice Lager

Posted 22 December 2013 - 01:57 PM

Went out on this one yesterday.  Complaint:  DOA and lid lock stuck locked, holding clothes hostage.  Raised the top and tugged the lid lock string to liberate the clothes.  The more vexing problem is the DOA.  

 

I went there with a noise filter, expecting it to be bad.  Sho nuff, it was.  Replaced it and now getting power to the main PCB but still no lights on the control panel, no action.  Only action is now when you press the power button, you hear a relay click on the main PCB.   

 

Also, the LED on the main PCB is not lit.  

 

I neglected to check for 5vdc between the main PCB and the display board.  

 

Questions:

 

- Is the LED on the main PCB used as a self test/all-okay signal like on the Whirlpool VMW machines?  If so, is the fact that the LED was out a conclusive indication that the main PCB is bad?  

 

- How diagnostically important is the 5vdc test between the main PCB and the display board?  

 

- The fact that the noise filter AND something else (possibly the main PCB or maybe  the display board) are bad bothers me.  It's unusual for two parts to fail at the same time.  Does this indicate that something else fried and took these boards out:  door lock, drain pump, etc?

 

Thanks for any tips!



Use the Appliantology Parts Search Box to Find What You Need!
Enter your model number, part number, type of appliance, brand, or even a part description.
365-day return policy on all parts purchased here, even electrical parts that have been installed!

#2 john63

john63

    Dean of LG Appliantology

  • Appliantology Fellow
  • PipPipPipPipPip
  • 2,211 posts
  • Location: USA

Posted 22 December 2013 - 03:36 PM

There's a Service Bulletin for this symptom (No Power) on LG WT4801 washers.

 

Check the MAIN BOARD part number.

 

The original (flawed) Main Board is part number (EBR73248501)

 

The revised/corrected Main Board is (EBR75131701)

 

The Service Bulletin is vague on details (cause of the "dead pcb")

 

Personally---I think I've only encountered this issue---2 or 3 times (in my neck of the woods).

 

**********

 

<<<Is the LED on the main PCB used as a self test/all-okay signal like on the Whirlpool VMW machines?  If so, is the fact that the LED was out a conclusive indication that the main PCB is bad?>>> 

 

**********

 

The Main Board LED *does* indicate that there's power coming to it---from the Noise Filter.

It does not however---provide any useful "clue" as to any other potential issue/failure---of components on the M/B itself (or software glitches).

 

**********

 

<<<How diagnostically important is the 5vdc test between the main PCB and the display board?>>>

 

**********

 

It's not a test that I find myself doing very often---unless I *think* that Main Board is *good* and I want to verify power-to-the-Display-Board from the Main Board (percentage-wise the Main Board is the culprit).

 

**********

 

<<<Does this indicate that something else fried and took these boards out:  door lock, drain pump, etc?>>>

 

**********

 

Fortunately---the electronics on this washer---are not hyper-sensitive---when other components fail (such as Drain Motor/Lid Lock Assy)---as is the case on the Whirlpool-built VMW washer design.


To eliminate:

Musty odor

L-O-N-G cycle times

Dingy/yellowing whites

Suds error message

Slow spin speeds

Intermittent water leaks (from rear of washer)

And other annoying symptoms which vary brand-to brand.

Read below:

The *correct* amount of HE (High Efficiency) detergent that should be used in any front load or agitatorless top load washer with tub sizes 3.0 cu ft and larger is as follows:

HE: (2) Tablespoons Per Wash Load

HE 2X: (1) Tablespoon

HE 3X: (1) Teaspoon

Perform a TUB CLEAN CYCLE every (4) months.

Use: "Tide Washing Machine Cleaner"

#3 Samurai Appliance Repair Man

Samurai Appliance Repair Man

    Shōgun

  • Master Samurai Tech
  • 29,808 posts
  • Location: USA
  • Flavorite Brew:Sapporo Original Draft Rice Lager

Posted 22 December 2013 - 03:48 PM

Awesome, John!  Thanks as always for the excellent info!  

 

Wish I had known about the service bulletin-- I mighta saved a handful of hair from scratching my head so much.  

 

Sounds like I may have gotten lucky on this one.  I went ahead and ordered a main PCB from RepairClinic yesterday with FedEx 2-day delivery, hoping I could get it fixed for them before Christmas Day.  I had no idea about the part number change but RepairClinic apparently did-- when I looked up the part by model number, it already subbed over to the new part number you listed!  

 

Thanks again!  

 

I'll update after I install the new board.  Keep hope alive!  



#4 Samurai Appliance Repair Man

Samurai Appliance Repair Man

    Shōgun

  • Master Samurai Tech
  • 29,808 posts
  • Location: USA
  • Flavorite Brew:Sapporo Original Draft Rice Lager

Posted 24 December 2013 - 10:37 PM

Success! Brother John was right on the money, as usual. The replacement main PCB came in tonight at 7:20PM. I jumped into The Guru Mobile, sped down to the customer's house and had her running in half an hour. Would have been less but I made a movie about it. Wanna see it? Here it is:



The customer was extremely grateful to have her washer fixed before Christmas. And I'm grateful for Brother John's reassurance that the main PCB was the only other problem besides the noise filter.

Just to recap, here are the two boards I replaced to fix this washer:

Noise Filter: http://www.repaircli...EC2002J/2448672

Main PCB: http://www.repaircli...5131701/2630177

Merry Christmas to all!

#5 jbeckman713

jbeckman713

    Yamabushi

  • Professional Appliantologist
  • PipPip
  • 61 posts
  • Location: USA
  • Flavorite Brew:Diet Pepsi

Posted 25 December 2013 - 12:11 PM

Can you bypass the noise filter and apply direct 120 to pcb to check it?



#6 john63

john63

    Dean of LG Appliantology

  • Appliantology Fellow
  • PipPipPipPipPip
  • 2,211 posts
  • Location: USA

Posted 25 December 2013 - 01:42 PM

<<<Can you bypass the noise filter and apply direct 120 to pcb to check it?>>>

 

**********

 

Yes.

 

Great job & video Samurai :)

 

From the look of the tub and the nozzles (that direct water to the Dispenser Assy)---this washer will likely soon need a Water Valve Assy (iron?)

 

 

Merry Christmas !


Edited by john63, 25 December 2013 - 01:46 PM.

To eliminate:

Musty odor

L-O-N-G cycle times

Dingy/yellowing whites

Suds error message

Slow spin speeds

Intermittent water leaks (from rear of washer)

And other annoying symptoms which vary brand-to brand.

Read below:

The *correct* amount of HE (High Efficiency) detergent that should be used in any front load or agitatorless top load washer with tub sizes 3.0 cu ft and larger is as follows:

HE: (2) Tablespoons Per Wash Load

HE 2X: (1) Tablespoon

HE 3X: (1) Teaspoon

Perform a TUB CLEAN CYCLE every (4) months.

Use: "Tide Washing Machine Cleaner"

#7 Samurai Appliance Repair Man

Samurai Appliance Repair Man

    Shōgun

  • Master Samurai Tech
  • 29,808 posts
  • Location: USA
  • Flavorite Brew:Sapporo Original Draft Rice Lager

Posted 25 December 2013 - 09:33 PM

Can you bypass the noise filter and apply direct 120 to pcb to check it?

 

 

Great question!  That would have been a good troubleshooting / problem isolation technique that would not have risked a new noise filter board.  I'll add that in the next video.  Stay tuned!  







Also tagged with one or more of these keywords: LG, washer, top load

0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users


FAQs | Store | Memberships | Repair Videos | Academy | Newsletter | Beer Fund | Contact


Use the Appliantology Parts Finder to Get What You Need!
Enter a model number, part number, type of appliance, brand, or even a part description.
365-day return policy on all parts purchased here, even electrical parts that have been installed!

Your Sometimes-Lucid Host:
Samurai Appliance Repair Man
"If I can't help you fix your appliance and make you 100% satisfied, I will come to your home and slice open my belly,
spilling my steaming entrails onto your floor."


The Appliance Guru | Master Samurai Tech

Real Time Analytics