Top rack does not wash dishes. - Kenmore Dishwashers

SOURCE: Dishwasher

Make sure not to prewash your dishes before you put them in the machine. The water needs to be dirty to activate the enzymes in the detergent. Are the dishes coming out cloudy? Also a sign of prewashing your dishes. Use only powder detergent and clean your machine by running 2 cups of vinegar on hottest cycle once a month. No gel and no tabs. They cause a build up in the unit and causes poor performance. Use rinse aid. Hope this helps.

SOURCE: dishes not washing clean

check water level in machine
may be not filling enough and the wash pump is starved from water thus not pushing water to upper arm
drain water from machine dismantle and clean out air tube to pressure switch take off air tube at pressure switch and blow back into sump then pinch air tube with fingers to stop air from flowing back up tube then refit to p/s
run and see if that solves problem

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

replace the top spray arm and it should work ok again

SOURCE: My dishwasher is not washing dishes on the top rack...

HI,

The top rack is not cleaning because of low water pressure from the wash motor to the upper spray arm.
Assuming the top spray arms are clear of debris, remove the lower spray arm to access the wash motor. Remove the 4 torx screws and the filter (accumulator assembly). Remove the torx screw and the inlet protector that covers the chopper assembly. Make sure the chopper is not broken (broken chopper will fill with debris and block water flow). While holding the chopper blade, reach inside the "D" shaped opening on top of the motor and spin the wheel/motor by hand in each direction to make sure either the chopper gear or the motor gear that drives the chopper is not broken. Replace the chopper if necessary . If the motor gear is broken, replace the sump and motor assembly . Remove any debris from the sump area in the process.
You don't have to shut the power off to the dishwasher because the door will be open, but if you feel more comfortable, do so.

thanks,

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.