Quiet series 300.
Find your circuit breaker for your dishwasher and turn it off for 3-5 minutes. Turn it back on, then turn on your dishwasher. If this works, after the complete cycle of your dishwasher, you have to turn it off manually by pressing "on" botton then press it 1 more time to cancel; this will turn off. The defect is, probably the moisture built up in the control board causing it to ground some of the connections. Suggestion for the manufacturer, insulate the control board to prevent absorbing moisture.
SOURCE: 1.5 year old Maytag Legacy Series Quiet Series 300 Lock Light on
Hold down the heated-dry button for 3 seconds and the light will clear.
SOURCE: Maytag Quiet Series 300 owners manual
my dishwasher does not want to work anymore it has a big L flashing
SOURCE: Maytag Quiet Series 300 Dishwasher will not turn off after it com
MY DISHWASHER KEEPS RUNNING, IT IS A WHIRLPOOL GOLD QUIET PARTNER IV
SOURCE: Maytag Quiet Series dishwasher won't start
Sounds like you have a bad Control Board
http://www.partstore.com/Part/Maytag/Maytag/MDB6600AWW/Maytag/Maytag/99003160/New.aspx
But with the price it cost, you might be better off buying a new dishwasher, preferably a different brand, cause that washer has some bad reviews
SOURCE: Maytag dishwasher legacy 300 quiet series
I was so impressed with the advice on this website, I thought I would take a stab at this. The difference is, I will include all the steps, so if I go into a little too much detail for you, I'm sorry, but I felt a few things got left out that needed to be said.
Tools Needed: screwdriver with t-15, and t-20 torx bits (available at any hardware store), and a pair of pliers. Also I used a headlamp so I did'nt have to hold a flashlight with my teeth.
step#1- Clear a spot on your counter or kitchen table and remove both the lower and upper racks from your dishwasher. The lower rack just lifts out, the upper you will find two light blue plastic caps that once removed will allow you to slide the rack off of the metal slides. Next, the long L shaped spray bar that goes up the back and across the top needs to be un-clipped and removed, 2 clips at top and 2 clips at the back. It might take a little wiggling but that spray bar slides into the top cover, once unclipped push back at the bottom and tilt the upper part toward you, it should come out fairly easily and give you wide open access to the cover. Next you want to remove the plastic nut that holds the spinner in place, using your pliers turn it counter clockwise, it should loosen fairly easily, and remove nut and spinner. Next with either a T-20 or T-25 torx bit, remove the 3 screws that hold the outer cover in place, notice the direction of the tube that plugs into the spray bar, make sure it goes back in the same way. Now remove the T-15 screw that holds the black grinder cover in place and remove screw and cover. Now remove the 6 screws that hold the inner cover in place and remove the cover. You can now see what all the fuss was about, mine included a piece of pistachio shell, a bay leaf, and a cherry pit. Once it's all cleaned out, just reverse these steps and be ready! You have just earned your place as your homes resident handyman or woman!
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