DU450 Dishwasher - Instructions

after reading the remarks from other DIY users of the site, I realized that not only did I need to replace the spray arm, but should replace the spray arm nut as well. The repair took less than a minute to unscrew the old one and add the new, and it has worked like a charm ever since. Thanks guys, and goooood luck.

Removed old door gasket and water deflectors and replaced with new. Got the gasket in backwards at first. Removed and rotated 180 degrees and it went in properly. (Used tech video provided by parts select to help me.)

Though the old gasket was definitely bad, water still leaked after replacement.

Key issue ...... over time, contamination has accumulated in the water shutoff lever assembly and also on the shutoff microswitch underneath the internal water float, making both sticky and non-responsive to water level. Water had been overfilling. (probably defaulting to a maximum number of seconds to fill). ALSO - original installation was not totally level, with back of tub higher than the front.

Leveled tub. Removed mocroswitch and lever and cleaned both of sticky grease.

No more leakage.. basic problem was actually overfilling, allowing water to surge into the lower internal door vent upon pump startup.

Ron
Mount Airy, MD

Our dishwasher got to the point where it would not complete a wash cycle. I found that by jiggling the door latch, the dishwasher would whir back to life. For awhile, if I put a clothespin on the door latch, somehow enough pressure would be put on the switch to keep the dishwasher going. Finally, the dishwasher refused to cooperate...so I ordered a replacement switch.

The repair was easy. I only had to remove the interior door panel, unscrew the metal bar at the top of the door and underneath the door panel, then remove the black plastic shield. After that, it was just a matter of wiggling the old switch out and wiggling the new switch.

CAUTION: Be very sure that the power to the dishwasher is turned off. I got a scare because I thought the circuit breaker was off, but I had flipped the wrong one and suddenly, with my fingers very close to the bare connectors, the dishwasher came back to life briefly. I ran downstairs and found the correct circuit breaker and all was fine after that.

Simply remove the washer nut,then pull the float assembly. As far the lever,just unscrew the screw and replace the actuator lever. What was great about everything I was able to go to the presented diagram. This allowed me to find the exact parts I needed. Of course make sure you have the model number.

Take the bottom skirts off of front. Put drain solinoid back in its bore and secure with wire or a rubber band.It will be a chrome cylinder hanging Take the center spray section out and look for the broken lever. Get both pieces out if it split and fell in two. Mine usually crack and stay on the shaft. Pull the circlip off and slide new lever in place and replace circlip. Re-assemble center section. If you are going to keep the dishwasher buy extra levers. I buy them 2 at a time and try to keep a spare.

cleaned lime and calcium build up off of gasket
and it stopped the leak . yea . parts select was very helpful and said i could return the unused
gasket. . this is a good place to get parts.thanks larry

Removed the old gasket. It was easy to "pop out" the parts that held the gasket in place with a regular flat blade screwdriver. Becareful not to chip the porclien (sp). Any of the tabs that broke off I just pushed them through and can take them out if I ever need to remove the front of the door. Works fine and no leaks. Clean the area of the old gasket so the new gasket will have a good seal. End of story.

removed spray head, pulled motor/pump assembly. took apart impeller housing and then removed motor and pulled impeller off its shaft, the most difficult part was actually pulling off impeller from the splined shaft. I actually broke old impeller in the process. The good thing is that the new seal came assembled with new impeller so that was not a problem. After re-assembling everything it worked fine and still works for a week since repair.

Make sure dishwasher is powered off. Remove all inner door panel screws. Lift inner door panel upward and lean against the tub. Use a putty knife or spatula to lift old lower foam seal. Make sure door seal area is clean. Start at one end, butt new foam against the side of door and slowly pull glue strip backing while pressing foam down from left to right. Reverse door assembly.

Make sure dishwasher if off and door unlatched. Remove lower kick panel 4 screws and remove 1 screw securing float switch arm. Hold float stem with pliers and remove bottom stem nut. Remove float and re-install the new float with reverse procedure listed.
Super fast shipping on items!! Great service.

All I had to do is lay the shield over the top and sides and used a couple of clips to hold in place as it was slid under the counter top. It couldn’t have been easier.We had searched everywhere for this replacement shield and parts select was the the only ones that had it. Very good service and fast delivery,

Dealer phone quote = $250. DIY repair = $55.
Turn-off DW electrical circuit breaker and shut-off hot water supply. Remove lower Front Access Panel and Toe Panel. Disconnect hot water supply, corrugated drain hose, electrical connection, and uncounter mounting brackets. Slide-out DW (being careful not to scratch flooring) and gently tip DW onto its back side. Rotate Ring-Lock at underside of Tub and (from inside the Tub) carefully lift out Motor-and-Pump assembly. At the Motor-and-Pump assembly, unscrew Center Spray Nozzle and remove Lower Spray Arm and lv Filter. At the end of the Impeller, remove Chopper Screw, Chopper, Chopper Plate (rotate 1/4 turn) and Chopper Wear Ring. Remove Motor Mount Screws and Motor Shield. Loosen Impeller {NOTE: left-hand thread} from motor shaft by the holding Motor Fan stationary and unscrewing Impeller. Pull apart the Motor and Impeller; discard old Impeller. Gently and thoroughly clean the internal surface of Housing Assembly seal with a toothbrush and soapy water. Carefully reassemble in the reverse order using the new Impeller. (Prophylactically, I also replaced the Motor "O" Ring and Pump Gasket.) DW works perfectly; no leaks!

Easy to change. Just pull firmly on old gasket, clean surface with soapy water. Align tabs on new gasket, push into place a tap firmly with handle of a screwdriver and taps pop into place. Was done in about 40 minutes.

Removed the lower Front panel, removed the (2) hoses from the Pump Assembly, Removed the Plastic Sprayer Recirculating Tube, than removed the (6) screws that hold the pump assembly in the washer basin, removed the assembly from the unit.
Disassembled the pump unit (6) screws, removed and replaced the (2) water impellers and bottom seal, reassembled everything and all is well. This machine is 22 years old and my local parts supplier said that parts were no longer available for it because of its age, well I have news for him PartSelect.com has any part I need!

Actual i missed diagnosed the leak and ordered a very expensive door gasket. The leak was coming from shrinage of the wax resevoire o rig and the tab seal for the soap dispensor. I missed the trees the forest got in the way. The leak was dripping alond the front panel well away from the main door seal.

I cleans a the plastic surfaces and noticed a lip around the opening for the reservoire and used 150 sandpaper to remove it. Replaced the O ring, tab seal and bothe selonoids and cleaned everything. Put it back together. Works find lasts along time

All I had to do was take apart the door by removing a few screws. Then ripped the old gasket off. I then lined all the tabs up to make sure it was going to fit and then started pulling them through with needle nose pliers. When the door was reassembled I checked the plastic piece where the gasket ends in the tub and found some loose screws that needed to be tightened. After that I ran a few cycles and it does not leak any more.