Re: BOSCH DISHWASHER SHU43C06UC/17 NO WATER UPPER ARM
Ours is a SHU3300UC/06 model, basic model which we bought in 1999 so have had 9 years of trouble free service. Recently
we noticed that there was soap left in the soap dispenser after the
machine had finished all the cycles. On further inspection we noticed
that the upper level glasses, cups and bowels are not consistently
clean and it appears that the upper washing arm is not working
properly. At the back of the upper washer arm, there is a rectangular
piece that slides over the two water outlet tubes projecting out of the
back of the washer which supply H20 to the upper arm. On removing the
upper arm and the rectangular connector, I noticed there is an inner
place that I think is supposed to work like a washer that fits tightly
over the 2 water outlet tubes in the protruding from the back of the
washer. I noted that the upper opening in the washer/seal is broken so
a proper seal is not established. This would cause insufficient water
pressure getting to the upper arm and reduce its effectiveness. Now
I'm trying to find the replacement part. It appears to be something
than can easily be replaced.
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Please check if something is blocked near the top spray arm, also make sure that all holes are oopen. Use a sharp metal pin to clean the holes on the top spray arm. Make sure the water pressure is not low. under the screen and youl'll need a Torx driver to get to it after you remove the spray arm and screen. Check to see that the path it travels is clear. I have seen these get blocked up by stuff.
Now check if the top arm spins freely and check the bearings for the arm, if they are producing extra friction while the spray arm spins. Hope this helps... Please post back if you need more assistance.
replace the upper water arm conduit and wash arm hub as they leak under years of pressure and the o-rings leak water and then it can't hold pressure and supply the upper arm with full pressure water,also replace the center arm conduit if it has one as this will wear out too
If the water doesn't drain from your dishwasher, check these:
Drain line/air gap--A clog in this part is the usual
reason that a dishwasher doesn't drain. Remove the drain line to clear
any debris from the hose or hose connection at the household drain line
connection. Reattach the hose before starting the dishwasher again.
Pump--You can reach the pump from inside the
dishwasher. Remove the lower rack, spray arm and support. Look for an
impeller, a device that spins around and forces water through the spray
arm. This is the wash impeller and beneath it is the drain impeller
that pushes the water into the drain port. Replace it if found
defective or worn out.
Drain valve/solenoid---The drain valve may have a
solenoid with lever that sticks or frozen and prevents the dishwasher
from draining. Free up the solenoid and lubricate the lever.
Belt---A certain brand of dishwasher uses a belt to drive the pump. Replace it if broken or worn out.
Motor---Check it if turning or working.Turn the rotor
manually to see if stuck and free it up. Replace if defective, it is
There is a screen that you can remove from the sump of the dishwasher to clean. Just twist it to the left and pull it out. I have some tips that you might want to check out if this does not resolve your problem. <a href="http://tclaundryrepair.com/">St Paul Appliance Repair</a>
If the spray arm is not binding due to worn out plastic bushings, then it could be a lack of water pressure, because it is water pressure which makes the arm turn. Give it a gentle tap in a clockwise direction,,does it spin easily? If it does,,then it will be lack of water pressure that will be the cause. Possible pump wear or failure.
only the top rack isnt getting clean? there is a little plastic
circle in the middle of the bottom of the upper spray arm. turn it
counter clock wise to pull the upper spray arm from the upper rack.
make sure that isnt clogged and the spray holes are not clogged.
the piece that the bottem spray arm plugs into and
runs along the back wall of the tank to the top is called a feed tube.
pull the bottom spray arm out. now you can see the part of the feed
tube that feeds the upper spray arm water. does it pop out freely and
easily? if so then you need a new feed tube, if not then its most
likely your not achieving the right water level or your impeller
connected to your circulation pump(motor) is clogged not supplying
enough water pressure to travel up the feed tube to spin the upper
Penrod, sounds like a circulation problem. Two things to check first. make sure the upper spray arm is not clogged with debris or split. Second is to twist and remove the filter and clear out any debris where the water enters the circulation pump impeller. If something has jammed the impeller, you would have to remove the dishwasher, remove the tank, remove the circulation motor and clean out the impeller...Catriver...post back.