LE Error on LG WT1201CV Top Load Washer (And I don't think it's the hall sensor)

[BenPog]

Hi Everyone,

I've got a bit of a weird one here. I have an LG WT1201CV top load washer. Last summer, we started getting an "LE" error on every second load. I looked up some info and I replaced the hall sensor. Things seemed to get better for a while, with only the occasional LE error. When the error would initially happen, it was usually before the high speed spin at the end of the cycle.

A couple days ago, I can't run the thing at all. I get LE during the load sensing stage, right before the machine should start filling and spinning the tub. 

Here's what I have tried:

-Went into diagnostic mode. Everything seems to work fine up until the high speed spin setting, then it reverts to "LE." 
-The tub seems to spin freely on its own by hand. Doesn't make a noise and doesn't feel stuck or seized
-The hall sensor passes the Ohms test (I get resistance on terminals 1 to 5 and 2 to 5)
-The hall sensor is putting out 10 VDC, cycling on and off as you turn the tub (like its supposed to, I think). Should it go right to zero?
-The board seems to be supplying 15 DCV to the hall sensor, so I think the board is doing its job
-I inspected the rotor and there are no broken or cracked magnets
-The stator reads resistance across all terminals

What the heck is going on?!

I repaired restaurant equipment for 5 years, so I have some working knowledge of appliances and how to troubleshoot, but this is stumping me! All the individual components seem fine but I still can't run the darn thing. I kinda want to say it's the board, but I don't want to spend the money on being wrong.

Any advice would be appreciated. Thanks!

[john63]

What is the Serial Number?

Press the POWER and SPECIAL USE buttons at the same moment to activate Test Mode.

When the lid locks--- press the START button once.

What is the software version displayed?

Old software version would be an 8 or 9.

Revised software is 11,12 or 13.

[BenPog]

Serial Number is: 404PNWK6G593 I believe

I will check software version later, as I'm at work right now. Any ideas what could be causing this?

[BenPog]

Unit is about 2.5 years old at this point.

[john63]

Built April 2014.

Forget the software version...too new and not an issue.

I am inclined to agree...Main Board failing under load.

ROTOR and STATOR on these newer models do not have a history of problems.

Wish I could offer more concrete diagnostics...

[BenPog]

1 hour ago, john63 said:

Built April 2014.

Forget the software version...too new and not an issue.

I am inclined to agree...Main Board failing under load.

ROTOR and STATOR on these newer models do not have a history of problems.

Wish I could offer more concrete diagnostics...

I appreciate the second opinion! Thank you! Are there any diagnostics I haven't done that could determine it? I guess the board could be faulty and still give the correct voltage to the hall sensor. I'll just order one and see. Never a good time to lose a washer with two young kids!

[john63]

The Hall Sensor gives feedback to the Main Board...weight in tub...direction of rotation...rpm...and allow lid to unlock when tub movement stops completely.

I suspect that problem will be on the power-to-motor side of the circuit (plug on the Stator).

LG does not yet detail a test procedure for load testing...yet.

Training instructors have recently mentioned that a scan type tool is forthcoming in less than 5 years. Can't wait.

[BenPog]

Ok cool. So for now I'll just replace the board and see what happens, I guess. This is the electronic control board, not the display board, correct? Thanks a lot for your help, John. I really appreciate the expertise 

[john63]

Yes...Main Board not the Display Board.

[JulianFarley]

On 1/18/2017 at 7:29 PM, john63 said:

Training instructors have recently mentioned that a scan type tool is forthcoming in less than 5 years. Can't wait.

Did the scan tool ever come out? 7 years later lol.

Edited August 9 by JulianFarley