We have a model MBD7601 washer that is not running normal cycles. For the regular washing, which normally takes 2 hours, it fills for 30 seconds, then drains the water and shuts down. It will run the 9 minute rinse cycle completely, though so not sure what sensor/software problem exits. How can I trouble shoot this?

The heavy cycle typically takes a long time because it includes a short soak and prewash. The older hot fill washers were quicker but used more water while the newer cold fill washers are claimed to use a third less water and so need to take longer over the wash.

The heating of the water also adds time to the cycle. Modern detergents work best, the manufacturers claim, with a rising temperature.

"Fisher washer stays on clen for over 3 hours" ???
I think you mean the "Dishwasher stays in the clean cycle for over 3 hours", right? First question is "What cycle?" If it's the Pots and Pans cycle, or "Pro-wash cycle" , or "Normal cycle with extra wash heat or sani-rinse options selected, then yes, this is normal! A Normal cycle (without added heat) will take about 2 hours. And a short or quick or 1-hour cycle will take less.

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The unit normally has a 1:20 to 1:30 fill cycle with pauses in between while the wash motor starts and stops without running a diagnostic mode this normally happens when the control outputs power to the wash pump motor but the pump doesn't start

Whatr is the model number?

Hello, W/D here.

For a single odor, I would recommend a neutralizing sequence. Use one box of baking soda. Fill the soap dispenser as you would with powdered soap, and pour the remainder into the wash tub. Fill the fabric softener and bleach dispenser cups with an odor remover such as Odor-Cide or Febreze. Add 1/2 the normal amount of detergent for a normal load directly into the tub. Run the washer on the hottest, longest cycle available, with the longest, hottest rinse cycle available (usually this is the sanitary cycle). When the cycle has finished, run another sanitary cycle with 2 cups of bleach in the tub, fill the soap dispenser, bleach dispenser and the softener dispenser with bleach also.
After this cycle runs, run another, normal cycle with white vinegar in the tub and dispensers. This can be a normal cycle.
After all of these cycles, one last regular cycle with about 1/2 the normal amount of detergent in the dispenser should get all of the smell neutralized in the machine.
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THAT IS NOT NORMAL!!!!!!! A normal wash and dry cycle will take approx. 2 hours in length including drying cycle.
You should see that water has been present in the machine within the first 2 minutes of the start of the wash cycle, you should also be able to hear the water entering the wash tub.
The fill valve or water supply seems to be the issue, if the water doesn't enter the tub then the controller won't proceed witht the wash cycle. Double check your water supply tube / hose to make sure there is water present at the connection to the dishwasher.
GOOD LUCK !

Your dish washer probably has a "turbidity sensor". This is an infrared sensor that checks the condition of the water and adjusts your wash cycle accordingly. There is probably build up on the sensor (especially if you have hard water) and this is causing it to run so long. The easiest fix for this is to run a cleaning cycle on the dishwasher. Start your empty dish washer on a heavy wash cycle and wait for it to start filling with water. As soon as it starts to fill, open the door and pour 1/2 gallon of white vinegar into the bottom of the unit. Close the door and let it run its cycle. At the end of the cycle, run a second cycle and see if things improved. If things still are not better, you may have a bad sensor. If you have more questions, write me back. Hope this helps!

2 to 6 hours is possible. The newer machines have a water heat cycle that will raise the water temperature. lets say your incoming water is 90 degrees. The machine want to see 140 -165 depending on the cycle so that cycle will take 75 minutes to reach 165 (1 min per degree temp rise). multiply that by the number of wash and rinse cycles and it can run a very long time. Water should enter the washer at 120 degrees minimum. let it fill and measure the temp you will be surprised. Eric

TOO LONG- 1.5 / 2 HOURS IS NORMAL

CHECK YOUR FILL TIMES SHOULD BE NO MORE THAN 5 MINUTES PER FILL

PUT THE DRAIN HOSE INTO THE SINK OR A BUCKET TO MAKE SURE IT IS CLEAR

FAULTY HEATER WILL ALSO MAKE THE CYCLE TOO LONG

OK, Duh..... I guess there is about a 2 to 3 min. delay for the liquid soap dispenser to fill up and disperse the soap into the washer tub. After that short cycle is complete the fill cycle engages and fills at normal speed.