Question about GE 24 in. Profile PDW7800 Built-in Dishwasher

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Need to clean out the upper spray arm and so would like to remove it (like I did the lower one) and clean it out. Help!

How do I remove the upper spray arm on a ge pdw 7800?

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We have a PDW7800J01WW that I removed all the arms on recently.
There is a single hex-head screw that acts as the pivot at the center of the top most arm. Just remove this screw to remove the spray arm.
Be very gentle reinstalling it though as it is easy to over torque it and strip the plastic hub it screws into.

Posted on May 15, 2009

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Most dishwashers dispense the detergent via gravity and the sprayer arms spraying against the soap dispenser once the little door flips open during the wash cycle. Since it sounds like the soap door is opening I would look at the sprayer arms and make sure they are free of food particles or other debris that might be keeping them from rotating and spraying properly. Here are some instructions for performing this check.

Remove the lower dishrack from the unit. Reach into your dishwasher and spin the lower spray arm. Take note of whether or not the arm moves freely or if its movement is restricted. It should not be restricted in its path of motion. Now gently pull up on an end of the spray arm. The spray arm should be free to wobble up and down. Unscrew the arm retaining knob (some of these are left hand threads) and take the arm out for inspection and carefully examine the spray arm seams. If they have split or are damaged, the dishes may not receive the amount of water pressure required to fully clean the dishes or to rotate the arm properly. What’s more, if water is in fact spraying out of the spray arm from its seams, it is possible that it can cause your dishwasher to leak. Make sure there is no debris in any of the holes.

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If your dishwasher has a spray tower, pull up on it as far as it will go and then let it fall back down. Again, this movement should not be restricted. It should be a fluid and smooth motion. Also, unscrew the spray tower and examine it for any debris or foreign objects. Remove any that you find.
Gain access to the upper spray arm by removing the upper dishrack. Perform the same tests for the upper spray arm as you just did for the lower spray arm. Keep in mind that the upper spray arm may not wobble as much as the lower spray arm.
On a final note, some dishwasher models have a water tube that meets up with the upper spray arm once the upper dishrack is pushed back. It is a good idea to check to make sure this tube is aligning properly with the upper spray arm and that this has not split or is damaged in any other way.

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My top rack is not getting clean, it appears spray arm is not dispersing water, can it get clogged?


Yes it can get plugged. Any debris pumped up to the arm can get lodged into the tiny holes. Also, sometimes the arm itself becomes split along the joint between the lower and upper half. Remove the arm to inspect, clean, and repair/replace the arm if split. I fixed our Maytag spray arm when it split, by drilling a series of small holes along the split parts and sewing the thing back together with fairly fine copper wire. Still working great after a number of years. The small spray holes can be poked clean with a heavy needle and the arm vacuumed out. If after all this it still won't spray properly, the intake screen at the bottom of the lower spray arm tower may need to be cleaned as well. Remove components starting with the spray arm and work your way down, noting placement and orientation of each piece. Remove the screen, and soak it in hot water, detergent and white vinegar for an hour or so. Check all holes in the deck for any food plugging. Reassemble in reverse order and check the lower spray arm for plugging as well. Hope some of this helps!

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Sprayers require water to pass through the jets to provide motion to the arms.

Suggestion;

Remove the sprayer from the machine and look for blockages. (Removal should be easy, at it is expected that the user will need to clean the jets occasionally; If you have any problems removing it, consult your manual).

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On the LG LDF xxxx dishwasher family, the Vario feature uses a motor/check valve to switch between "full power" cleaning from _either_ the lower or the upper spray arms, never at the same time. So, not seeing the upper arm spin during the lower arm spinning is standard operating procedure.

But back to your problem. Step one would be to remove the filter assembly again and make certain that there is nothing (debris, broken glass) blocking the white areas where the check valve rotates to switch between upper/lower spray arms. A blockage there ~could~ cause impotent spraying/cleaning.

If there is no blockage and the impeller remains in good shape, suspect a failing wash pump motor. Try to isolate the noise to that motor.

Watch for error codes on the display and report back what you find, OK?

Good Luck!

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Check the upper spray arm for debris plugging the spray holes, if clean then pull off lower spray arm and filter screen, and clean and remove any debris found in the sump, check the disposal blades as well. You will need a torx style screwdriver to remove the sump screen on this unit. You can buy a set for under $10 at your local hardware store.

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1 Answer

Whirlpool quiet wash plus


I assume you are having spray issues, or a grinding noise. If odor is your issue, go to the bottom of the message.
For the dishwasher pictured above, Open the door. Remove the lower rack.
Push in the tabs holding the upper basket rail end caps and slide the caps up and out. Remove the upper rack. Clean the holes in the upper (or middle) spray arm.
Hold the lower spray arm still and rotote the thumb tab clockwise. Remove the lower spray arm. Clean the holes in the lower spray arm.
Use a small flat screwdriver to release the tabs holding the upper spray tube from the dishwasher inner wall and ceiling. Rotate the spray tube to the right and remove the tube.
Using a # 20 Torx bit, remove the (about 10) small screws holding in the top of the sump assembly. Remove the top section with the fingers all around it.
Using a # 15 Torx bit, remove the screw holding the round cover over the pump suction. Remove the cover (grab the tab sticking off the corner with a pliers and pull up.)
Anything stuck in the sump will now be visible. If the screen is completely clogged up, then the blade isn't wiping the screen clean. In this case, the screen should be replaced.
The screen is removable, but difficult to re-install. If you need to re-place it, put an open end wrench between the screen and the rotating blade to hold the spring compressed. Also, notice the screen isn't round. The flat edges fit only in the slots they came from.

If it's odor or white powder you want to clean out, use a dishwasher cleaning product such as Dishwasher Magic.

I tell every dishwasher customer: "You do not need to rinse your dishes before washing. But you do need to scrape them off."

Good luck!

Good luck!

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