Water remains in the chamber, after finishing. Washer Maytag neptune WAH5500 BWW

SOURCE: I need an instruction manual for Maytag topload washer Neptune TL

Get the Service Manual this will help you diagnose issues with this washer.  I found a Service repair manual on this site search for this; FAV6800 Manual.  Check the postings and you will find a URL to the manual.

From another member a step by step to dump water from machine in diag mode  ""One other thing I learned for those of you who don’t want to bail out the water in the tub. If you want to have the machine drain the excess water without bailing this should work. Turn the machine off and make sure the "locked door" light goes off. Then hold the "Spin" and "Enviro Plus" buttons at the same time for 3 seconds. "00" should then show up on the display. Then hit the "Delicate" button, then the “Pre-soak” button. This should activate the pump and get all the water out. Once the water is out hit the off button. You then may want to try the Spin cycle alone. These directions can be found on the Troubleshooting Manual found folded up behind the rear panel of the machine where the main electrical circuit board is located.""

SOURCE: i have a maytag neptune washer the water will not drain out of it

First drain as much water from the drum as possible and unplug from the outlet. Then there are 2 screws left and right under the front lower panel at floor level. Undo those two screws. Pry the front panel DOWN from the door panel. Once the lower panel is removed you will see the pump and pump filter on your right. The pump filter is to the left. It has a large turnscrew. Be ready with a pan or something to catch the water from the open filter! Screw this counterclockwise until it comes loose. You will now be able to remove the filter and all the debris. After cleaning, re-screw the turnscrew. Before you put back the front panel test that it is clear by doing a wash. If it still doesnt drain you must remove debris from the pump itself. The pump is between the pump filter and the pump motor on the right. Undo the white clips from the motor and the retaing clips attiching the filter to the metal washer body. Then turn the motor clockwise to separate it from the filter. Refit carefully after job is done. And fit outlet tube a correct height, not too deep. <courtesy tzotsi>

SOURCE: Maytag Neptune washer has bad odor, city water.

There is no filter in your washer that would cover the odor issue.
The website link below will give you all the information concerning odors in a Maytag Washer

http://maytag.custhelp.com/app/answers/list/kw/odors/p/293/r_id/108284/sno/1/search/1/session/L3NpZC9RRDdZdDhEag==

SOURCE: My Maytag Neptune Washer Model MAH3000AWW, Serial

Hello, The earlier Maytag Neptune front loaders have a balance ring on the inner tub that has liquid in it and that causes the sloshing sound when you turn the tub by hand. That is normal.

I noticed that you have a MAH3000... Have you replaced your door latch wax motor yet? If not, it will fail and damage your control board located behind the timer. See NeptuneHelpSong for a video that explains the failure.

I hope this helps...

SOURCE: Maytag 5500Bww washer wont drain

I had a similar problem along with many others. After replacing the door switch, seals, and bearings I learned a liile secret that will save you hours of frustration and lots of money (this virtually eliminated all problems). Get rid of it. Load it up, get it out of where you live, put as much distance between you and it as fast as possible.Take it to a scrap yard, they'll give you enough $ to buy some beer etc.Then get on your knees and ask GOD to forgve you for buying a WASHING MACHINE THAT HAS CIRCUIT BOARDS IN IT.