Question about Kenmore 15939 Built-in Dishwasher

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Dishwasher leaves a fine black sludge on dishes and all over the dishwasher itself -- racks, around the soap dispenser, the door, the floor, the blades, etc. It looks like black mold except it has a little bit of texture. It slowly builds up until it is so bad the dishwasher will run continuously for hours. We have thoroughly cleaned out the filters, the dishwasher itself three times. We replaced the plumbing to the dishwasher Machine drains well Water temperature is fine. Have tried different dishwasher detergents At first we thought it was food but now wonder if it is a black rubber component that is deteriorating?

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  • Anonymous Feb 18, 2008

     i have the same sludge.  i've heard to run an empty load with 2 cups of vinegar and some baking soda in the cycle.  haven't tried it yet though.  

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I work in a hospital and have seen this problem with our scope washers (a very sophisticated dishwasher with lots of safety features) and it turned out to be a faulty pump motor.  Some pumps have black ceramic magnet in them and if it cracks it will breakdown and mix in with wash water creating a black smudge on everything with bits. Just as you described.  Unfortunately, I have never taken a part a dishwasher motor so I don't know if it's the same type of motor. 

Posted on Oct 11, 2007

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