My Maytag Neptune washing machine {MAH6500AWW} powers down after the complete wash cycle. I have to unplug the unit and plug it back in for it to function properly. What is wrong with the unit? Is

SOURCE: maytag neptune front loading washer

purely based on the vague information you have given, this could sound like the drum bearings and the fact that it has been neglected for so long has resulted in serious damage to your machine, note to all, never continue to use machines making noises, it can only get worse and do mare costly damage, after all the problem could have been a very inexpensive fix problems on this and any other site, to be fixed by messages (without actually seeing the machine) can only be fixed - or advice can only be given based on the details that are given if you say my machine just stopped then you will not get an answer will you? engineers can help sort out lots of problems without seeing the machine if we are given the right DETAILED information, no matter how silly it sounds, so before you shout and complain at others, have a thought about what you are going to write sorry its bad news but i hope i have helped

SOURCE: Maytag Front Load Wash Machine not draining

CHECK DRAIN outlet SOLENOID

SOURCE: how to get front panel off neptune fav6800aww washing machine

Just a quick search in this forum fot "Front Panel" returned this post which says it better then I could.

http://www.fixya.com/support/t538238-remove_front_panel

SOURCE: neptune tl washing machine spin cycle

Mother26, I have a fair amount of experience with mechanics and have repaired a few washing machines and dryers in my past. For me, both components are easy to replace. Your repairman would have an equally easy time. I'd estimate an hour to repair and verify. Your trouble comes in is the $122 for the replacement clutch and the $82 for the tub displacement sensor. And that's assuming there's no damage to anything else so far.

In my case, change the previous owner didn't remove from pockets destroyed the clutch, transmission, and pump. and somehow spillage caused the tub displacement sensor to short. Overall, far too many parts to make repair equitable.

Keep in mind, this is, in the opinion of many, a failed design on the part of Maytag. Ultimately, it's a toss up on how confident you are that your current condition is the limit of your problems.

SOURCE: maytag neptune washer keeps beeping

The Service Manual for reference. Sears Parts Direct for reference.
I have tried to work with a few folks on this issue never received feed back to resolution see this post. I feel the issue is caused by one of three possible issues.

A stuck key issue/defective Spin Cycle key making constant contact forcing the Key/LED to cycle thru the Spin Cycle settings. Under normal conditions if you press and hold the Spin Select key it will cycle thru the settings, yours has a mind of its own (defective issue).

A false signal from the Control Board for the Spin Cycle.

A corrosion path issue at the Membrane Pad ribbon cable socket connection between pins 5 and 4. See page 20 of the SM button functionality “Spin” key.

Try to verify that the spin cycle membrane key is not stuck/defective signaling the Control Board to cycle thru the spin settings. I have not experienced this issue but let’s try the Membrane Pad Test to get a start point. See the Service Manual page 15, I have modified the process to make it a bit more understandable at least for me. Make sure the two digit display is not On or Lite.
Press the off button first so there is nothing displayed in the Two Digit display of your FAV6800AW.

Now Enter / Exit Service Mode

To enter Service Mode press the Enviro Plus and Spin Only keys for three seconds or until the control beeps. While in Service Mode, pressing the Presoak key will start a membrane switch check that verifies switch operation.

All the LEDs (except Presoak ) can be toggled or slewed by pressing the key associated with the LED or set of LEDs. Do not press the Presoak again during this test.

Press each key once and only once including the Signal Key the on side and the off side, also the UP and Down Arrow key of the LED display. All keys (including the OFF button) must be pressed within 5 minutes for this test to pass. “PA” will be displayed for five (5) seconds once all keys have been pressed and the test is completed (more like PA will be displayed for only a few seconds on my FAV6800AW). Following 10 seconds of inactivity at any point, this test will exit without any display. Let us know the results.

See my additional comment this board has message limit issues.