Maytag Neptune FAV6800AW Top Load Washer Logo
Posted on Feb 15, 2011
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What's the purpose of the tub displacement sensor

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Anonymous

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  • Master 526 Answers
  • Posted on Feb 17, 2011
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To detect excessive wash tub movement and shut down the wash cycle. Here is a copy of my post from a real DIY forum;

Google this Neptune TL Washer FAV6800AWW 5 post down.


Here ya go.....in this post I discuss the issue related to unbalance error codes DC and UC;

Your FAV6800A or FAV9800A is going off balance with DC or UC unbalance error codes during spin cycle and you see/hear the wash tub banging around at the start of Spin Cycle of the wash cycle or a Spin Only cycle. If this is the condition the TDS (Tub Displacement Sensor) is working as designed and signaling the Control Board properly of an unbalance wash load condition.

The Control Board receives a varying D.C . Voltage from the TDS sensor and if the out of range D.C. Voltage limit continues the Control Board will halt the Spin Cycle and try to redistribute the wash load. If you are interested I will show you how to monitor the TDS input to the Control Board with a DVM.


The Control Board then starts the Spin Cycle again. If the wash tub/basket out of balance condition continues the Control Board will attempt another redistribute of the wash load. After several attempts (4 to 5 I believe) the Control Board will shut down the Spin Cycle and send a error code DC or UC to the LED display of the FAV6800A, my machine type. And I believe a text statement to the LCD screen of the FAV9800A machine i.e. something like "Unbalance Condition" I'm not sure what the text message is.

If you need help open a post in that repair forum and I will try help you through your issue.
The forum is free and my time is free I just don

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Anonymous

  • 335 Answers
  • Posted on Oct 14, 2009

SOURCE: Maytag Neptune FAV6800AW Code LL

Hey HopelessR,

The LL error code For the FAV6800AW is one of those errors that I feel is not documented very well. The only explanations I see is Large Load detected, “” The washer cannot spin because the load is to large”” OK what the heck is the trigger input to the Control Board to issue this error code to the Console Display????

I believe it’s Motor RPM not reached. I would try the Quick Spin Test on page 14 of the Service Manual and see if your machine will spin up to 850 RPM with an empty wash basket. Do you run up to 850 RPM “85.”?

I then reran the test with two large bath towels that were soaked, had to lay them in the wash basket to balance as best I could. I wanted to rerun the test with some load. The wash basket spun up thru all ranges to 850 RPM and completed with 3 beeps. Just wondering what RPM range you can complete too.

I have to additional commenst, this board has message limits for guys like me.

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Related Questions:

0helpful
1answer

Safety displacement sensor
What?

Are you talking about the Tub Displacement Sensor TDS?

What is the Model number of your machine?

FAV6800A or FAV9800A?

Rich
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May 20, 2010 • Maytag Neptune FAV6800AW Top Load Washer
4helpful
1answer

My Maytag Neptune TL FAV6800AW Washing Machine is receiving the dC error code on every load. It sits at 12 minutes remaining and attempts to spin several times before throwing the codes.
Hello zacas6,

dC/uC unbalance errors are caused almost all the time by a Clutch malfunction. Take a look this post and see if you want to DIY the repair. I will help you through the process.

I would also check the Tub Displacement Sensor. This a thru the lid check and you get a feel of how to enter Service Mode.

Tub Displacement Sensor Diagnostics check.
It is possible the Tub Displacement Sensor may have failed try this check which is in the Troubleshooting guide stored in your washer console or refer to the SM.

a. Enter the Service Mode by pressing and holding the Enviro Plus and Spin Only keys for three seconds or the display reads “00”

b. Press the Super Wash key display reads “in”…something like that.

c. Press Delicates the Display will show “UC” (Unbalance Closed).

d. Push tub to the back right corner of the machine the display should change to “UO” (Unbalance open). Release tub and the display will show “UC” (Unbalance Closed).

e. Press Hand Wash.

f. Pull tub to the front left corner while pushing the tub down the display should change to “UO” (Unbalance open). Release tub and the display will show “UC” (Unbalance Closed).

I have some additional info if you decide to remove the Clutch in the machine if you are going to DIY.

Rich
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Nov 30, 2009 • Maytag Neptune FAV6800AW Top Load Washer
0helpful
1answer

Maytag FAV6800AW won't spin. COuld this be the
Hello leaweber,

Yes most times it is a Clutch malfunction . Is the machine failing with “dc” and or “UC” unbalance error codes in spin cycle? If you are you may have a Clutch malfunction or Tub Displacement Sensor failure more likely a Clutch issue.

You can do a quick TDS sensor check thru the lid just follow this from the Service Manual. If you machine will pass the TDS check the next step would be to remove the clutch from the machine and inspect as I describe in this post.

Tub Displacement Sensor check from the SM slightly modified;

Tub Displacement Sensor Diagnostics check. This test is done with the washer lid raised see page 19 for the details.

It is possible the Tub Displacement Sensor may have failed try this check which is in the Troubleshooting guide stored in your washer console or refer to the SM.

a. Enter the Service Mode by pressing and holding the Enviro Plus and Spin Only keys for three seconds or the display reads “00”

b. Press the Super Wash key display reads “in”…something like that.

c. Press Delicates the Display will show “UC” (Unbalance Closed).

d. Push tub to the back right corner of the machine the display should change to “UO” (Unbalance open). Release tub and the display will show “UC” (Unbalance Closed).

e. Press Hand Wash.

f. Pull tub to the front left corner while pushing the tub down the display should change to “UO” (Unbalance open). Release tub and the display will show “UC” (Unbalance Closed).

If you get these results your TDS sensor should be just fine. Time to look at a clutch repair/replacement. Let me know if you need help…. Rich aka dh1200s
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Nov 08, 2009 • Maytag Neptune FAV6800AW Top Load Washer
0helpful
1answer

UC code on may Maytag Neptune Washer FAV6800WW
Continuous Unbalanced Circuit. Improper signal from Tub Displacement Sensor.
Wet Clothes • Very small clothes loads can cause unbalanced loads - add additional towels. • Excessive suds may have been present. • Check Tub Displacement Sensor connection and main harness connector at machine control board. • Check Tub Displacement Sensor for 0 to 3.0 Volts DC output voltage between ground and the board input. Check for 12 Volts DC input voltage between the ground and the board output. Only check for voltage at the Tub Displacement Sensor. Do not perform a continuity check. See Tub Displacement Diagnostics • Excessive motion was detected in spin Run Quick Spin Test with an empty tub to check Tub Displacement Sensor and machine control board. • Check for restricted drain system.
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Jun 18, 2009 • Maytag Neptune MAH5500B Front Load Washer
0helpful
1answer

Will not spin because the unit moves all cloths to one side and then wobbles until it errors
I saw you post from back in November, did you do anything with your clutch? I assume you are taking dc/UC errors to the console. Take a look at this post and see if will give you some insight to a DIY fix. Shout back if you have any questions. Here is a quick test for the TSD sensor but I believe you have a clutch issue. The TDS test is in the SM I’ve typed it out if you want to give a quick check. I’m sure you will pass and find the one-way roller clutch berings are dry/rusted and causing the dc/UC unbalance condition.
3.0 Tub Displacement Sensor Diagnostics check.



It is possible the Tub Displacement Sensor may have failed try this check which is in the Troubleshooting guide stored in your washer console or refer to the SM.

3a. Enter the Service Mode by pressing and holding the Enviro Plus and Spin Only keys for three seconds or the display reads “00”

3b. Press the Super Wash key display reads “in”…something like that.

3c. Press Delicates the Display will show “UC” (Unbalance Closed).

3d. Push tub to the back right corner of the machine the display should change to “UO” (Unbalance open). Release tub and the display will show “UC” (Unbalance Closed).

3e. Press Hand Wash.

3f. Pull tub to the front left corner while pushing the tub down the display should change to “UO” (Unbalance open). If you get these results your Tub Displacement sensor should be OK and I believe it’s not the component failure producing dc/UC errors in spin cycle. I would remove the clutch for inspection and re-lube or replace if necessary. There is a more technical troubleshooting method to check Tub Displacement Sensor in the Troubleshooting guide and Service manual.
Rich
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Jun 16, 2009 • Maytag Neptune FAV6800AW Top Load Washer
0helpful
1answer

I have an 2002 Maytag Neptune TL (FAV6800A) that won't spin. I replaced the clutch about a month ago. Worked great until now with same problem. Replaced clutch again,but won't work. Received advice from...
Hey Nick,

“”Received advice from one of your experts that it was a resistor problem w/instructions to fix. Opened my machine up and the mother board does not match””

That’s not the way I troubleshoot. Did you pull out the troubleshooting guide out of the console, while you had it open it’s good to have the schematic that’s all that advice was good for.

Do you take any errors to the display such as dc/UC while the wash cycle moves into spin cycle? If you run a Spin Only Cycle with no clothes in the wash basket will it complete the cycle? Does the wash basket spin at all in Spin Only cycle? If it does have you done a Tub Displacement Sensor check? I us this quick check to rule it out.

3.0 Tub Displacement Sensor Diagnostics check.
It is possible the Tub Displacement Sensor may have failed try this check which is the Troubleshooting guide stored in your washer console or refer to the SM.

3a. Enter the Service Mode by pressing and holding the Enviro Plus and Spin Only keys for three seconds or the display reads “00”

3b. Press the Super Wash key display reads “in”…something like that.

3c. Press Delicates the Display will show “UC” (Unbalance Closed).

3d. Push tub to the back right corner of the machine the display should change to “UO” (Unbalance open). Release tub and the display will show “UC” (Unbalance Closed).

3e. Press Hand Wash.

3f. Pull tub to the front left corner while pushing the tub down the display should change to “UO” (Unbalance open). If you get these results your Tub Displacement sensor should be OK and I believe it’s not the component failure producing dc/UC errors in spin cycle. I would remove the clutch for inspection and re-lube. There is a more technical troubleshooting method to check Tub Displacement Sensor in the Troubleshooting guide and Service manual.

Rich
Read full answer
Jun 06, 2009 • Maytag Neptune FAV6800AW Top Load Washer
0helpful
1answer

Will not finish last spin cycle or drain water out of tub.The letters "dc" flashes on the monitor.
The issue with dc/UC errors will only get worse. Take a look at this post and see if it will help you. Many owners of the FAV6800AW/FAV9800AW have experienced this issue. Root cause almost all the time is the one-way roller clutch bearings. There could be an issue with the Tub Displacement Sensor and there is a quick test for this I will attach the test in this post. If you have basic mechanical skill sets give it a try. I and others will try to help you thru the issue if you decide to go forward, post back if you have questions. Rich

3.0 Tub Displacement Sensor Diagnostics check.
It is possible the Tub Displacement Sensor may have failed try this check which is the Troubleshooting guide stored in your washer console or refer to the SM.

3a. Enter the Service Mode by pressing and holding the Enviro Plus and Spin Only keys for three seconds or the display reads “00”

3b. Press the Super Wash key display reads “in”…something like that.

3c. Press Delicates the Display will show “UC” (Unbalance Closed).

3d. Push tub to the back right corner of the machine the display should change to “UO” (Unbalance open). Release tub and the display will show “UC” (Unbalance Closed).

3e. Press Hand Wash.

3f. Pull tub to the front left corner while pushing the tub down the display should change to “UO” (Unbalance open). If you get these results your Tub Displacement sensor should be OK and I believe it’s not the component failure producing dc/UC errors in spin cycle. I would remove the clutch for inspection and re-lube. There is a more technical troubleshooting method to check Tub Displacement Sensor in the Troubleshooting guide and Service manual.
Read full answer
Jun 06, 2009 • Maytag Neptune FAV6800AW Top Load Washer
0helpful
1answer

When it gets to spin cycle shuts off and shows uc or dc so i remove all clothes un plug and some times that works most time not
James,
The issue with dc/UC errors will only get worse. Take a look at this post and see if it will help you. Many owners of the FAV6800AW/FAV9800AW have experienced this issue. Root cause almost all the time is the one-way roller clutch bearings. There could be an issue with the Tub Displacement Sensor and there is a quick test for this I will attach the test in this post. If you have basic mechanical skill sets give it a try. I and others will try to help you thru the issue if you decide to go forward, post back if you have questions. Rich
3.0 Tub Displacement Sensor Diagnostics check.
It is possible the Tub Displacement Sensor may have failed try this check which is the Troubleshooting guide stored in your washer console or refer to the SM.

3a. Enter the Service Mode by pressing and holding the Enviro Plus and Spin Only keys for three seconds or the display reads “00”

3b. Press the Super Wash key display reads “in”…something like that.

3c. Press Delicates the Display will show “UC” (Unbalance Closed).

3d. Push tub to the back right corner of the machine the display should change to “UO” (Unbalance open). Release tub and the display will show “UC” (Unbalance Closed).

3e. Press Hand Wash.

3f. Pull tub to the front left corner while pushing the tub down the display should change to “UO” (Unbalance open). If you get these results your Tub Displacement sensor should be OK and I believe it’s not the component failure producing dc/UC errors in spin cycle. I would remove the clutch for inspection and re-lube. There is a more technical troubleshooting method to check Tub Displacement Sensor in the Troubleshooting guide and Service manual.



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Jun 04, 2009 • Maytag Neptune FAV6800AW Top Load Washer
0helpful
1answer

Dc error code just moved
Hello apalo14,
Do you think your FAV6800AW got jarred around in the move?
The FAV6800A/9800A Service Manual on Page 53 will take you thru the leveling process. I would check the front and rear struts to make sure they are supporting the tub correctly. You will have to raise the top of the washer page 33 of the SM will show you how to release the top of the washer. Page 41 will take you through front panel removal of two 5/16” screws. I would remove the front panel and check that tub is being supported by the front and rear struts properly see pages 40 thru 43. With the front cover removed check the mounting of the Tub Displacement Sensor page 42. If those checks all look good I would run the Tub Displacement Sensor check below, this test is detailed in the SM.
3.0 Tub Displacement Sensor Diagnostics check.

3a. Enter the Service Mode by pressing and holding the Enviro Plus and Spin Only keys for three seconds or the display reads “00”

3b. Press the Super Wash key display reads “in”…something like that.

3c. Press Delicates the Display will show “UC” (Unbalance Closed).

3d. Push tub to the back right corner of the machine the display should change to “UO” (Unbalance open). Release tub and the display will show “UC” (Unbalance Closed).

3e. Press Hand Wash.

3f. Pull tub to the front left corner while pushing the tub down the display should change to “UO” (Unbalance open). If you receive these results your Tub Displacement sensor should be OK.

If your machine does pass the Tub Displacement Sensor check and all of the above checks out then as unlikely as it may seem you may have a clutch issue. But let’s see what we have after the above checks are completed.
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Apr 06, 2009 • Maytag Neptune FAV6800AW Top Load Washer
0helpful
1answer

Maytag Neptune TL 6800 dc code
Hello ldrpc

Take a look at the Service Manual page 42. I have to leave for work in a few minutes. I can attach a pic of mine later today if you need. Are you throwing dc/UC errors did you do this check?

1. Tub Displacement Sensor Diagnostics check.
It is possible the Tub Displacement Sensor may have failed try this check which is the Troubleshooting guide stored in your washer console or refer to the SM.

3a. Enter the Service Mode by pressing and holding the Enviro Plus and Spin Only keys for three seconds or the display reads “00”

3b. Press the Super Wash key display reads “in”…something like that.

3c. Press Delicates the Display will show “UC” (Unbalance Closed).

3d. Push tub to the back right corner of the machine the display should change to “UO” (Unbalance open). Release tub and the display will show “UC” (Unbalance Closed).

3e. Press Hand Wash.

3f. Pull tub to the front left corner while pushing the tub down the display should change to “UO” (Unbalance open). If you receive these results your Tub Displacement sensor should be OK and I believe it’s not the component failure producing dc/UC errors in spin cycle. I would remove the clutch for inspection and re-lube. There is a more technical troubleshooting method to check Tub Displacement Sensor in the Troubleshooting guide and Service manual. Rich
Read full answer
Mar 20, 2009 • Maytag Neptune FAV6800AW Top Load Washer
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