Re: top dishes do not clean well (seems to get too little...
Who makes the unit if . I work on K/A units alot along with other
brands. The sump has a screen in it that needs to be cleaned out you
should also check the spray arm (take it out) and clean it. But most of
the time it is the sump (soft food grinder) is cloged up.
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Sure its redeemable if you have the time and money. If I understand you correctly when you move the lowewr spray arm the water drains out? If this is the case then more than likely its a pump motor or solenoid. Reason I say this is on the bottom of the spray arm is a impeller and under that is filter and then pump impeller that drains the water. If its not draining but will by hand then its your pump motor or solenoid. When you start the washer then press cancel/drain do you hear anything? Maybe a humming sound. One more thing could be a thermal fuse for the motor. These are usually not resetable its a one time fuse if it blows you have o buy another one.Hope this helps
Clean the sprayer arm. You can try running dishwasher cleaner through the machine or remove the arm and make sure the holes are clean and free from obstruction. If this is clear then you will need to check the pump to make sure it is pushing water at a sufficient flow to clean the dishes on the top rack.
I had the same problem and fixed it by disassembling the lower spray arm and return filter, and cleaning all the junk out.
Most dishwashers have 'risers' that bring the water up to the top
sprayer or arm located under the top rack. If the recirculating pump
is plugged even a little there won't be enough volume or pressure to
get the water up there.
Test this by putting a dry muffin pan in the top rack, flat, and
running the dishwasher for a bit. If there is no water on the top (or
the bottom) either the top sprayer or the sprayer arm underneath the
top rack is not getting enough volume.
To fix this you need to clean out the screen and filter, where the
water returns to be recirculated. If you don't have any confidence to
remove the parts and clean it out yourself, get an appliance repair
person to do the job.
Check the pump out. Even though the Hose is and tubes are clear it does not necessarily mean that the pump is not pumping water to the top sprayer. One way you can do this is take off the upper spray tube and lay it in a glass or bowl and turn on your machine for a minute or so to get the water flowing if it flows then I would take off the spray assembly itself and make sure that there is no blockage on the bearing race
There may be a couple of solutions to your problem. First, if you are not rinsing the dishes thoroughly before loading, your sump area in the bottom of the machine will get clogged, thus preventing enough velocity to reach top rack. Second, and most likely, your water inlet valve (or solenoid valve) is restricting. You have a timed fill mode through the timer and if the valve is not opening fully, you do not get the proper rate of flow into the machine. Replace the valve and your problem will most likely be solved.
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