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Dwu7400/Dwc7400 Parts

Some parts shown may not be for your model. To see parts for your model only, select it from "Matching Model Numbers" list on the left.

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Rinse Aid Reservoir (Dishwasher)
Genuine Whirlpool part
By: Whirlpool
Part Number: WP99002833

This rinse aid reservoir holds and dispenses rinse aid into the dishwasher's final rinse cycle to help reduce spotting and improve drying performance. Replaces a worn or cracked reservoir to restore proper rinse-aid delivery. What it does:

  • Stores rinse aid and meters it into the final rinse to improve sheet-drying and reduce water spots
  • Helps prevent streaking and film on glassware caused by inadequate rinse-aid distribution
  • Stops leaks or overflow that can occur from cracked or damaged reservoirs
  • Works with the dishwasher's dispenser assembly to deliver the correct amount each cycle
What's included: One rinse aid reservoir. Install notes:
  • Disconnect power to the appliance before beginning any work.
  • Access typically requires removing the inner door panel; handle panels and fasteners carefully.
  • Inspect mounting clips and seals; replace damaged hardware to prevent leaks.
  • Refill with manufacturer-recommended rinse aid only; run a short cycle to ensure proper operation and no leaks.

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$45.95
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$54.68
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Screw, Trim
Genuine Whirlpool part
By: Whirlpool
Part Number: 912619

 

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$19.95
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$23.94
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Screw
Genuine Whirlpool part
By: Whirlpool
Part Number: WP4312464

 

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$5.46
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$6.01
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$0.55

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Shield
Genuine Whirlpool part
By: Whirlpool
Part Number: WP6-918554

 

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$31.42
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$37.08
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Cover, Wire
Genuine Whirlpool part
By: Whirlpool
Part Number: 99003022

Color: Black

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$4.66
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Strap, Support
Genuine Whirlpool part
By: Whirlpool
Part Number: WP912654

 

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$7.95

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Water Level Switch (Float)
Genuine Whirlpool part
By: Whirlpool
Part Number: WP99002560

This water level switch senses the dishwasher's tub float and controls the water inlet. Replacing a worn switch restores correct filling, helping prevent overfilling or dry cycles that can reduce cleaning performance. What it does:

  • Monitors the float position to open/close the fill circuit at the proper water level
  • Common symptoms: dishwasher won't fill or stops filling too soon
  • May also cause continuous filling/overfill if contacts are stuck closed
  • Intermittent operation can leave the tub underfilled and washing performance poor

What's included:

  • 1 water level (float) switch

Install notes:

  • Disconnect power and shut off the water supply before servicing
  • Remove the toe/kick panel to access the switch near the float assembly under the tub
  • Note wire positions; transfer connectors one at a time and secure the switch in its bracket
  • The float moves freely and actuates the switch before reassembly and testing

This part fixes the following symptoms
  • Will not drain
  • Won't start
  • Will not fill with water
See more...
Do-It-Yourself Stories from Customers like You Dishwasher wouldn't drain   Ken S. • Columbus , OH • August 18, 2018

I called and talked to a customer service rep and she helped me troubleshoot the problem and order the correct part. She also sent me the pdf of the repair manual and I followed its instructions to replace the drain solenoid. It was a fairly easy repair. I wasn't sure if I would need the water level control switch, but I ordered it to be on the safe side. Turns out the original is still good. Read more

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Knob- Rins
Genuine Whirlpool part
By: Whirlpool
Part Number: WP6-903123

 

Do-It-Yourself Stories from Customers like You Replacing a melted cap to rinse aid dispenser   Theresa K. • Ridgely , MD • November 18, 2014

Was easy to locate exact part needed by inputting model number Received my part in under a week. Great site for parts Read more

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Spring, Cup Lid
Genuine Whirlpool part
By: Whirlpool
Part Number: WPY912547

 

This part fixes the following symptoms
  • Door latch failure
  • Will not dispense detergent
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Do-It-Yourself Stories from Customers like You Problem with detergent cup lid.   John M. • Craig , CO • November 27, 2017

The foam was shot on the detergent cup lid. Hard as a rock. Causing caking problems, dribble down the inside wall of the door and leaving lumps of detergent. Cut the door in half wit aviation snips and pulled out the two halves. Discovered at this point that the spring had gone soft. Bought one ahead of time, so I was set. Put the spring on the left pin, put the spring pin in the door, slipped the door into place (open) and put the right pin in with pliers. Door snaps open now. Read more

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O-Ring (Seal), 1
Genuine Whirlpool part
By: Whirlpool
Part Number: WP99002003

This O-ring creates a watertight seal in your dishwasher's wash or drain system, helping prevent leaks and maintain proper water pressure. Replace a brittle, flattened, or damaged ring to restore a reliable, leak-free connection.

  • Provides a watertight seal between mating parts such as pump housings, fittings, or hose joints
  • Helps stop drips and seepage caused by a worn or deformed seal
  • Common symptoms: water under the unit, moisture around pump/tubing connections, or leaks after reassembly
  • Replace if the old ring is cracked, cut, flattened, or hardened
What's included: 1 O-ring Install notes:
  • Disconnect power and turn off the water supply before servicing
  • Place a towel or shallow pan to catch residual water
  • Clean the groove and mating surfaces; lightly moisten or use a manufacturer-approved lubricant to help the ring seat without pinching
  • Seat evenly, reassemble without overtightening, and run a short test cycle to check for leaks

Do-It-Yourself Stories from Customers like You Had water leak between door causing puddling on floor   Frank M. • Shelby Charter Township , MI • February 04, 2017

Removed 8 screws that retain inner door to outer door. Removed rinse aid dispenser nut and replaced O-ring around dispenser. Also, removed 2 screws that retain the latch assembly and replaced rubber grommet around latch lever that retains soap dispenser door. Read more

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Latch
Genuine Whirlpool part
By: Whirlpool
Part Number: WP99001291

Note: Check Serial Number for correct part

Do-It-Yourself Stories from Customers like You My dishwasher would not start the latch would not catch   Gary L. • Calmar , IA • July 04, 2017

I installed the door latch assembly and handle. It worked fine after that. Read more

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Upper Wash Arm
Genuine Whirlpool part
By: Whirlpool
Part Number: WP903079

 

Do-It-Yourself Stories from Customers like You Dishwasher was making a "thump" as it ran through the cycles   Merlin L. • Sweet Valley , PA • November 14, 2016

The top sprayer arm was worn after 20 plus years of use. I replaced the "Washer Arm Retaining Clip/Outlet, Snap/ Upper Wash Arm". I first viewed a YouTube video to show me some troubleshooting tips. Narrow the "thump" to the upper wash arm. A simple fix. Unscrew the old arm. Assemble the three parts together. Screw the new assembly in place. No tools required. Everything came out by hand, back in by hand. Read more

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Seal Ring-
Genuine Whirlpool part
By: Whirlpool
Part Number: WP912644

 

Do-It-Yourself Stories from Customers like You Had a leak from side of tub   Joey L. • Longmont , CO • October 25, 2018

Replaced the water injector and seal. Read more

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Nut, Spray Arm Suppor
Genuine Whirlpool part
By: Whirlpool
Part Number: WPY912930

 

Do-It-Yourself Stories from Customers like You Broken nut support bar   Allison C. • Butler , PA • January 17, 2015

Took less then 5 minutes! I'm a girl and I fixed it all by myself!!! Read more

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O-Ring
Genuine Whirlpool part
By: Whirlpool
Part Number: WP912510

 

This part fixes the following symptoms
  • Not cleaning dishes properly
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Do-It-Yourself Stories from Customers like You No error codes just not washing like it was supposed to and not cleaning dishes   Paul B. • Elizabeth , CO • September 14, 2015

Ordered the new o-rings for the pump housing and main filter screen unit. Cleaned all water hardness and other debris out of all parts. Main filter and inside parts clogged with water hardness/limescale and other debris. The 3" wide round filter internal was completely clogged with debris and some of the filter holes we crystallized with water limescale. The pump was in good shape but all the filters and parts just needed to be cleaned. Some useful tips on this Magtag Jet Clean... Read more

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Hook- Latc
Genuine Whirlpool part
By: Whirlpool
Part Number: WP99001355

 

Do-It-Yourself Stories from Customers like You Dishwasher would not complete entire cycle wash   Hans B. • Warner Robbins , GA • July 24, 2019

Installed door latch assembly with switch contacts supplied with the assembly. After troubleshooting, found out it was only 1 of 2 switch contacts that were bad. Read more

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