Why doesn't the top rack of my dishwasher clean dishes?

I would check for a water flow blockage in the pipes.

This is caused by the chopper screen being pluged up you have to take the sump apart and clean the chopper.

Hi,

I have an older dishwasher also and recently my wife also complained about it not cleaning right... so me being the man I am tried in vain to clean the things... Bought new spray arms online and installed them in minutes...now the thing works like new... However I have also found that if the heating element goes bad then that also can mess things up bad... So I would buy new spray arms, and also check out the heating element to make sure it is working... Here is a tip that will help you with the online buying...

Dishwasher Spray Arms not Spinning

How to Buy Appliance Parts Online

A bad heating element causes many problems in dishwashers...

Dishwasher Problems The Heating Element not Working

Dishwasher Maintenance

Dishwasher Residue and Film on Dishes

heatman101

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Check whether the top rack spray arm main hose sits firmly into the
machine. If there is a leak in this area water pressure may not develop.
Also check the water pump in the machine!

It looks like GE replaced two components into one new part for the rack slide. Do a search for WDX35X20994

https://www.geapplianceparts.com/store/parts/ModelSectionParts/PDW7800G00BB/3/0/0/0/UPPER_RACK_ASSEMBLY

bad circulation pump.

Do you have a garbage disposal? If I run mine while the dishwasher is running, dishes do NOT get clean!

try c.l.r. to clean dishwasher check and clean lower and upper spray arms out, run no detergent you can also run vinegar in it as well about a cup full,let the machine start to run then stop dish washer for a few hours then restart see if this works for you use a short cycle.

removed the sprayer. the part that spins under the top rack and check that the holes arent clogged.

I would suggest you buy some CLR and run it through a full heavy cycle with the washer empty. Be sure to put it in all dispenser areas and sprinkle about 1/4 cup into the washer before starting.