My Whirlpool Quiet Partner II does not clean the upper rack of dishes properly. They are greasy. I have checked the top spray arm for blockages. There were none. I am fairly certain that water is

Sounds like your not using a rinse aid. Fill the dispenser with jet dry. Not only it keeps dishes spot free but it help to dry them as well.

could be a few things clean inside filters and screens listen to it does the wash motor during wash sound strong like it tossing water around in there open the door during the wash see if kicks some water out at you. If it sounds and seems like its working ok then some units have a rubber check valve little flapper in the tube that goes up the back wall to the upper spray arm i have seem break off and clog that tub not allowing any water to the upper spray arm.

There are 2 spray arms for the top rack. A small one on the dishwasher top and a bigger one attached to the bottom of the upper rack. Both get water feed from a flat tube that runs up the back wall of the dishwasher. Not much to the very top little arm--just check the spray holes for any food blockage and try to clean with a brush or tooth pick. The bigger arm on the bottom of the top rack gets its water feed through a hole about half way up the flat tube on the back wall. When you push the rack all the way in, it has to plug itself into that hole in the back wall. Check that plug in area and make sure nothing broke off that would keep it from making a good seal with the rack all the way in. All check all the holes in the spray arm for food blockages. On the very end of all spray arms is a main hole that is the drive hole to spin the spray arm. The water shoots out that hole and acts like a jet engine to push the arm around. Make sure those holes are clear.

Your water pressure is not high enough in the dishwasher to wash the dishes on the top rack. The most common reason is that the pump in your dishwasher cannot pump fast enough to keep the water pressure up. That is because the shaft that drives the pump impeller also drives the macerator cutter that grinds up bits of food fine enough for it to pass through the screen and out to the drain. Over time, small bits of bone, broken glass, eggshell, and other items that are too strong to be cut up by the cutter end up sitting in the area where it has to spin, and they prevent it from spinning fast enough to pump enough water to the top rack with any pressure. It is simple enough to repair. You need to take out the racks, remove the bottom arm and clean out the little macerator. Once that is done, it should work great again.

if it is just affecting the upper rack i doubt it is just a plugged spray arm (though i could be wrong). more likely than not you have a blockage on the intake of your spray pump motor. a series of bones, toothpicks, foreign material, etc could be blocking the entrance of the pump causing it to starve for water so to speak.
you will more than likely need to remove the lower rack and spray arm to be able to disassemble the strainer and gain access to the sump.
a complete model number would help bunches to.. alas

Hi,

I would suspect you have debris in the pump that is causing a pressure drop so the water is not spraying well in the upper arm.

Try this procedure to clean out the sump. Let me know if it helps.

http://www.fixya.com/support/r4628450-poor_cleaning_or_noisy_pump_whirlpool_or

MAKE SURE THE UPPER WASHER ARM IS NOT CLOGGED, SOMETIMES FROM DETERGENT BUILD UP IF YOU'RE USING POWDER DETERGENT. CHECK ALSO FROM THE BOTTOM IS THERE'S ANY DEBRIS THAT MAY PREVENT THE WATER GETTING TO THE UPPER WASHER ARM

In my experience, you probably have a clog in the spray arm/arms for the top rack. Take the arm(s) out and see if the holes in them are clogged. Rice, plastic wrappers, and glass from dishes that broke in there are the most common culprits I've seen.

check to make sure your lower spray arm openings are not blocked.

A guess: the solenoid that directs the water from the pump is not opening fully. Clean it. It is a little nasty to get to but will likely cure the problem.