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KitchenAid Dishwasher Lower wash arms question

22 days ago

Our KitchenAid Dishwasher Model # KDTM404ESS3 was the best performing dishwasher I have ever owned up to about 5 months ago. Its cleaning performance was impressive. Overnight it seemed dishware started not getting thoroughly cleaned. I have experimented with the cycles, and nothing at this point resolves the issue. It is not the detergent. I notice on the lower arm which has 3 different smaller arms, that I can manually turn two of the smaller arms, but not a third one. I am trying to figure out if that is how it operates, or if all 3 should revolve on top of that larger one. I have noticed that one section of dishware in the lower rack will get clean while another section does not. Silverware was always sparkling and now is hit or miss. Upper rack is better, but not like it used to be. I am getting ready to place a service call as our KA Slide in range's oven has malfunctioned, so I have to get someone out anyway. I just want to be as informed as possible so we don't incur an unnecessary repair. The DW will be 8 years old next week.

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