This is my failure resolution with DC/UC error codes a common problem with this model;

I just did a repair on my FAV6800AAW by lubricating the needle bearings in the clutch pulley hub, the tub displacement sensor checked OK per the service manual check. I was getting dc/uc errors in the spin cycle, washer was purchased in 7/05. I have basic mechanical skills and used a socket wrench to remove clutch pulley hub, just follow the service manual removal steps to remove clutch pulley hub. Pull the plastic cover off the clutch pulley hub and inspect the spring, clean/lube needle bearings and the clutch hub coupler that drives spinner shaft. I used WD40 I may need to re-lube down the road with a good light grease. It took a few tries for me to get the clutch pulley hub to stay on after re-install and power up, getting the clutch pulley seated properly is the trick. I did not remove the washer tub for this fix, I believe I saw a posting where someone did. I just leaned the washer back to get a better reach angle, it is a tight work area. I did not want to junk 3.5 yr old $1k machine with out trying a fix. If you want to work on this model get the service manual, I found it online and I believe you can order it in PDF format from Maytag. Good luck!

I just went thru my 10th load of a mix of light, medium and heavy loads and all work fine no unbalance errors (DC/UC). Doesn’t fix the tangle problem :) Prior to this fix I could only run the washer with no clothes in it to complete a cycle with no dc/uc error codes.

I found a Service repair manual on this site search for this; FAV6800 Manual

Had the same problem a few months ago. the drain pump was clogged with string and would not run. when this happens the cycle stops at 11 min. check to see if the impeller on the pump moves freely