I have a front loader that won'tdrain all the way

Ok, my serviceman just left after fixing the problem.  First, as the manual states, you should check the hoses and clean out the lint, which my husband did.  What the manual doesn't tell you is that if you unscrew the front panel on the bottom (you need a special bit to do this), there is a round drain on the bottom.  It's about 3-4" in diameter, and has an impression on the front so that you can unscrew it.  You have to pull it out a bit under a bar so that whatever is stuck in there can come out.  Make sure you have a large container because when he unscrewed this round drain, about two gallons of lint-filled water came rushing out.  The other point is that he said that the drain pipe in the back should only be coming out about 4-6" because otherwise, the water can back up, causing that mildewy smell.  Hope this solution saves you the $120+ it cost me.

A way to determine if your drain pump/motor is weak or not functioning 1) clean your filter first then take the drain pump hose down from the inside framework of the machine, lay it out flat,drain to an outside source or to a floor drain (you get my drift--the water HAS to drain somewhere!) then run it through a normal wash cycle. If there are no further problems, then you have successfully isolated the problem. This solution is for a whirlpool duet model number GHW9100 LW1but is probably applicable to most other machines!

In my case the washer never drained for some reason. The washer wouldn't let me open it. Hence it wouldn't let me run the drain cycle. Because the machine forces you to check the clothes so you don't accidentally wash them twice I'm guessing. What you do to fix the problem is "UNPLUG IT" This resets everything and then it will let you run the drain and spin cycle. Worked like a charm :).

Get the "new and improved design" of the water drain pump. For an older GHW91003540 Duet machine it is Whirlpool part # AP3953640. Call Whirlpool at 1-866-698-2538 to see if they will send you one without charge. The whole smell problem is directly related to this drain pump which performs poorly and thus all the drain plumbing becomes mildewed (because it is full of water) and this nasty, stinky undrained water gets into the machine and pollutes your laundry. I recommend taking all this drain plumbing apart and washing it...you will see it is full of mildew. Once that is done and the pump replaced you will never have another problem so long as you use an HE low sudsing detergent and leave the door open so the grey gasket at the opening dries between loads.

Possible your outlet filter is blocked. After disconnecting electrical input from wall socket, remove the back panel of washer to see if the pipe from the tub is blocked, clear, also check the outlet filter, clean.