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WHY DOES THE SPIN CYCLE UNBALANCE THE MACHINE CAUSING A DC ALERT

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What's the purpose of the tub displacement sensor


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

Feb 15, 2011 | Maytag Neptune FAV6800AW Top Load Washer

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Maytag Neptune washer has the error code of UC during the spin cycle. What is the problem?


in the Maytag Neptune FAV6800AW Top Load Washer Forum so I assume the machine type is a FAV6800A or FAV9800A correct?

Most issues are caused by a Clutch malfunction if the machine errors out with dC or UC unbalance error codes during the spin cycle. If your wash tub is banging around during a Spin Cycle and the TDS and Control board are working as designed the Control Board will shut the machine down with an unbalance error code dC or UC.

If the machine model is a FAV6800A LED console or a FAV9800A LCD console version it can be fixed with basic hand tools and some DIY effort. If you call in a repair service you are looking at $300 to $400 ballpark if they have a clue of how to troubleshoot the issue. If you DIY cost could be $0 if you have a can of WD-40 around a dab of lithium bearing grease to $75 ball park for a Clutch Pulley replacement.

See this post Clutch Fix and if you want to DIY and save/extend the service life of your 1$K machine.
Post back if you have questions……..Rich

Apr 25, 2010 | Maytag Neptune FAV6800AW Top Load Washer

1 Answer

I have an error code uc in the spin cycle what could be causing the problem?


uC = a continuous unbalance condition of the wash load.

Because you are posting in the Fixya Neptune FAV6800AW Top Load Washer forum I’m going to assume your machine type is a FAV6800A or FAV9800A.

For those machine types I feel you are experiencing a clutch malfunction. Can you confirm the machine model number and let me know if you want to try a DIY repair. You only need basic hand tools and skill sets to repair. See this post for what is involved and this a most recent post of a forum members repair for a dC error code condition in Spin Cycle which related to the uC error code in Spin Cycle.

Dec 23, 2009 | Maytag Neptune FAV6800AW Top Load Washer

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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

Nov 08, 2009 | Maytag Neptune FAV6800AW Top Load Washer

2 Answers

I just replaced the tub displacement sensor on a Maytag Neptune TL and corrected UC errors, now the unit is stopping during the rinse cycle with a LL code regardless of the load size.


If it doesn't do this when spinning empty replace the clutch assy,it is actually the bottom pulley on the tub. the clutch doesn't lock the wash plates in place and they turn while the tub is spinning,but without a load it will spin fine.

Sep 21, 2009 | Maytag Neptune FAV6800AW Top Load Washer

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Codes and holes


Hi mandystreet,
I’m an owner like you; from what you describe I feel you have a clutch issue if you’re machine is a FAV6800AW or FAV9800AW. I'll bet it completes the spin cycle with no clothes in the wash basket. Here is what is happening
See this post for a step by step process to remove the clutch. Try a maintenance clean up of the One-way Roller Clutch bearing and see if that will get you back in service, if not I would do a Clutch replacement.
Your machine is shutting down the spin cycle with dc and UC errors so your Tub Displacement Sensor is working as designed.
From the Service Manual page 12;
During fill cycle – If machine tumbles and spins simultaneously replace clutch assembly.
During spin cycle – If machine tumbles and spins simultaneously replace clutch assembly.
You can check this out by turning off the water supply lines if you check during water fill cycle. Lift the washer top from the base and observe the action during water fill or spin cycle. The Service Manual will show you how to raise the washer top from the base.
This is happening because the clutch One-way Roller Bearings are sticky, slightly rusted. When the machine enters spin cycle the agitator shaft is slightly engaged because the one-way roller clutches are dragging this will cause the agitator shaft to rotate in spin cycle spinning the tumblers slightly. In this condition the wash load is tossed about while the wash basket begins to spin up. This will cause the Tub to become unbalanced and the tub starts making greater swings.
This continues until the TDS (Tub Displacement Sensor) signals an unbalance condition to the Control Board and shuts the cycle down with a dc or UC unbalance errors. If the TDS fails in this mode the machine would likely walk across the floor until it unplugged itself or ended in a self-destruct.… :)
A WD-40 clean up and re-lube may get you back in service. Just follow this posting step by step. If you are not a DIY type direct your service repair to this e-mail to help speed you to repair and control cost. You can redistribute the wash load until the cows come home and you will continue to fail with UC or dc unbalance errors…. Fix the clutch issue and your machine will be happy and so will the owner.
Rich

Sep 14, 2009 | Maytag Neptune FAV6800AW Top Load Washer

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Maytag Neptune FAV6800AW has dc code won't complete spin cycle


Hello julygirlrn,
Take a look at this post and see if you or someone you know has some very basic mechanical skills and can do a clutch replacement or roller clutch bearing re-lube. The dc/UC unbalance errors are a very common failure issue with the FAV6800AW/FAV9800AW clutch.
I have put together a step by step process to perform a clutch replacement process, this repair will get your $1000 machine back in service with a $50 dollar clutch replacement. Worse case you can give the repair person some facts and maybe control cost and speed to repair. I believe you will find you will pay $350 - $400 to have it repaired.
If you pay more than $50 dollars for the clutch you are throwing money away. Clothes Washer Clutch - 25001169
You can try this test just to rule out the TDS as the failure point almost all the time dc/UC unballance errors are related to clutch issues with this machine model.
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.
Enter the Service Mode by pressing and holding the Enviro Plus and Spin Only keys for three seconds or the display reads “00”
Press the Super Wash key display reads “in”…something like that.
Press Delicates the Display will show “UC” (Unbalance Closed).
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).
Press Hand Wash.
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.
We can turn on the drain pump in Service Mode to pump out excess water, let me know if you need help with that. The link I have in this post will send you to the Service Manual on this site in PDF format. I believe a lot of folks toss this $1K machine where a $50 dollar clutch replacement or an even cheaper Oneway roller clutch bearing clean up (if the bearings are rust free) will get the machine back in service.
Post back if you decide to DIY the fix and need help.
Good luck… Rich

Jul 22, 2009 | Maytag Neptune FAV6800AW Top Load Washer

1 Answer

Not happy with Maytag Neptune TL Washer


I assume you are taking dc/UC errors to the console. This is a classic problem with the FAV6800AW/FAV9800AW after the 3yr to 5 yr mark. I own the machine and decided to learn what was involved to repair the machine. Take a look at this post and see if will give you some insight to a DIY fix to resolve the unbalance errors. No fix for the tumbler action of twisting up the clothes. After a re-lube of the one-way roller clutch bearing I could wash a single pair of socks or over load the wash basket with bath towels and extra water in the tub with no unbalance errors (dc/UC).

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.

Jun 26, 2009 | Maytag Neptune FAV6800AW Top Load Washer

1 Answer

WASHER READING CODE DC


Hello jdebruler44 ,

If it’s a FAV6800AW then you probably have an issue with a clutch malfunction, dry or rusted up oneway Roller Clutch Bearings. Take a look at this post , I have helped a lot of folks thru the issue. That link will also steer you to the Service Manual on this sight. If you or someone you know has basic mechanical skills sets you can perform a roller clutch bearing clean up or clutch assembly replacement if necessary.

I would estimate that a repair service that knows how to troubleshoot dc/UC errors would charge $300+ for a fix. I’m an owner like you not a repair person and anyone that wants to get involved can do this. I also recommend a $50 dollar clutch which I have put into my Series 16 FAV6800AWW (first two digits of your S/N is your series number the S/N is located on the back right side of the console) and it works fine, I can’t tell any mechanical difference from it and my original clutch. If you can get away with a roller clutch bearing clean up you could back in service today.

This machine is designed to go into spin cycle with a fair amount of water in the tub. I feel the design team did that to help dampen out tub oscillations when entering spin cycle…. Anyway you can pump out excess water when you fail in spin cycle with dc/UC unbalance errors with this process from the SM……

Close the lid and enter the Service Mode by pressing and holding simultaneously the Enviro Plus and Spin Only keys for three seconds or the display reads “00” Next press the Delicates key this will lock the lid. Now press the Presoak key the drain pump will turn on . Stop the test as the SM states with the off button or hit the Presoak key.

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 oneway roller clutch berings are dry/rusted and causing the dc 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. There is a more technical troubleshooting method to check Tub Displacement Sensor in the Troubleshooting guide and Service manual.

Shout out if you have questions or need help. Rich

Jun 15, 2009 | Maytag Neptune FAV6800AW Top Load Washer

1 Answer

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

Jun 06, 2009 | Maytag Neptune FAV6800AW Top Load Washer

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