Lower arm seems to work, middle & upper not working

Dishwasher Repair
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1

Hi (and thanks!). I’ve got a Whirlpool quiet partner 1 dishwasher that fairly recently stopped getting the upper rack clean. Lower rack seems to clean OK. I’ve pulled out the middle spinner to verify it isn’ full of stuff.

#1: How do I defeat the door interlocks so I can observe IF all the arms are getting water?

#2: If the lower arms spins, but the middle doesn’t, and the feed tubes are not obstructed, any suggestions?

I’m wondering if it’s the seal between the middle spinner and the feed point on the back wall of the dishwasher, but I don’t see any evidence of a gasket or a way to seal them tightly-could I have pressure loss there? If I can at least observe them working, I may be able to spot something.

Thanks again!

Sid

2

Remove the half round pump cover on the pump base and sponge out all the water. Turn the water off to the dishwasher, turn the dishwasher on, and verify the chopper turns by opening the door briefly. If turning, but the screen is clogged, replace it and the check valve in the bottom of the pump base next to the chopper.
Parts needed, chopper AP3039186, check valve, AP3152971