Top rack cleaning

SOURCE: upper rack dishes dirty

Is it filling with enough water. Look or if you don't know how much water is supposed to be there , Just add a gallon of hot water to the machine after it fills. If this solves the problem check the filter in the fill valve or replace the valve.

SOURCE: kitchen aid dishwasher doesn't clean dishes in the top rack

replace the top spray arm and it should work ok again

SOURCE: Kitchenaid, new dishwasher, stopped cleaning top rack dishes

The problem most people encounter with dishwashers is a simple inability to get the dishes clean. There might be stuck-on food or residue from the detergent. A water pressure problem may be the culprit. You may need to replace the water intake valve. Another common problem is mineral build-up. If your house has hard water, the mineral build-up can clog the water jets. Clear each jet with a wire or pin, and run an empty load with some vinegar in the detergent dispenser about once a month.

Sometimes, the dishwasher has problems draining properly. There could be a clog in the drain hose, or a problem with the pump. It's also possible that the dishwater is getting too sudsy, and sensors in the washer aren't detecting the soap foam as water. This causes it to shut down the drain cycle too early. Just use less detergent.

SOURCE: My whisper quiet dishwasher is not cleaning the top rack dishes

I'm having the same problem. Did some testing and found that the sprayer on the top rack is not even moving and hence not getting any water. Not sure what to do.

SOURCE: the top rack does not get clean. There is a dirty

Most likely the "food grinder" screen is clogged, which limits the flow throught the pump, leaving thehigher dishes unwashed. It's flaw inthe design of whirlpool/kitchenaides. Not only does the screen clog but the teeth on the "grinder" wear down, the girneder does no grinding, and the food particles build up onthe screen, clogging the water flow. Open up the collector, pul out he choer/grinder and clean the screen. Check the teeth on it and if worn, repalce the chopper/grinder. If it happens again , then the choper/grinder driving mechanism is basd -- replace the pump/motor assembly.