I turned my mah5500b Maytag Neptune washer on today and where time usually shows it says do. What does this mean? It smells kind of hot

There will always be some residual water left in the outer tub after draining. This is normal for most washers. Purchase a container of Oxy-clean and cycle the washer a few times using hot water settings with a half-cup of Oxy-clean added to each cycle. This will help remove any organic matter left behind that might be causing odors.

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Hello, Thank You for using FixYa. I will be helping you today.Try 2 cups of white vinegar on a heavy duty cycle with hot water.Pour it in the detergent dispenser after it starts to fill. Also the affresh tablets work good i would use 3 tablets at one time if your unit is as bad as you say.
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your machine has a fill problem either your screen is pluged on the water hose either hot or cold or your water is turned off.

Hello there
The LR error on your non-spinning Maytag Neptune is usually, though not always, accompanied either by a burn spot or a blown fuse on the Motor Control Board.

Burn Spot on a Maytag Neptune Washer Motor Control Board (click to enlarge)
Blown Fuse on a Maytag Neptune Washer Motor Control Board (click to enlarge) Either way, it means just one thang: a new motor and motor control board kit are in your future.

I owned a maytag neptune washer and had to run dishwashing liquid thru it occasionally to get the smell to go away. Finally we learned about a new gasket retrofit that they were doing which was covered by the maytag company we called and they installed it for free and the smell stopped. I had that washer for about 10 years and probably spent as much fixing it over the years as it cost. I now have a whirlpool duet front loader and love it. no smell and not problems. Try the electric dish washer soap.

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==

Control Panel is bad, need to replace

fl is a over fill. clean the pump out and the sump near the pump is in the back the dran hose goes to it

ND error means no drain. When this happens it is usually a problem with the drain pump assembly, located under the bottom panel, inside the machine.

check the drain hose and the drain lines, ensure they are not obstructed. Probably the drain pump need replacement.

I believe we tracked it down to the pressure switch mounted on the drain pump. The device had a strong electrical burn smell and is positioned where it could easily have smoked the basket. We're putting the washer back into service and if I have a recurrence I will post the information. BTW ... Replacement was simple and the part was $26 including shipping.