W11814182 Whirlpool Center Spray Arm for Dishwashers, Fixes Poor Upper-Rack Cleaning

🇺🇸 Matching U.S. Part Number: W11814182

W11814182 is a genuine Whirlpool dishwasher center spray-arm and manifold assembly. It replaces discontinued Whirlpool part numbers W11174340, W11545334 and W11789943.

The assembly connects with the dishwasher's upper water-feed system and distributes circulating wash water through the center spray arm across dishes in the upper rack.

A cracked, clogged, separated or seized spray-arm assembly may contribute to poor upper-rack cleaning, weak spray coverage, rattling or a center spray arm that does not rotate.

Similar symptoms can also result from blocked filters, low water level, a clogged feed tube, damaged docking components, circulation-pump problems or dishes preventing the spray arm from turning.

This is the center or upper-rack spray-arm assembly — not the lower spray arm or third-level spray arm. Confirm the complete dishwasher model and revision before ordering.

Disconnect electrical power and shut off the water supply before servicing the dishwasher.

Is This the Right Part?

Confirm the complete model number before ordering. Similar spray-arm assemblies may differ in docking style, feed-tube diameter, arm length or mounting clip design.

Common Symptoms

• Poor cleaning on upper-rack dishes — food residue remains after a full cycle
• Center spray arm not rotating during the wash cycle
• Weak or uneven spray coverage on the upper rack
• Rattling or knocking noise during operation
• Water leaking from a cracked or separated manifold body
• Spray openings visibly blocked by food debris or mineral deposits

Check Before Replacing

• Inspect and clean the spray-arm openings — mineral deposits and food debris are a common cause of reduced spray performance
• Check for rack interference — tall items or incorrectly loaded dishes can prevent the arm from rotating
• Inspect the feed tube and docking retainer for damage, blockage or poor seating
• Check the dishwasher filter and sump for blockage — a restricted filter reduces water pressure throughout the wash system
• Verify the water supply valve is fully open and the dishwasher is filling to the correct level
• Check for circulation-pump faults before replacing the spray-arm assembly

Part Details

Installation Notes

1. Disconnect electrical power and shut off the water supply before beginning.
2. Remove the upper rack and locate the center spray-arm assembly at the feed-tube connection point.
3. Photograph the docking retainer, feed-tube connection and mounting clip orientation before removing.
4. Compare the new assembly with the original before installing — verify docking style, arm length and feed-port diameter match.
5. Inspect the feed tube, docking retainer and surrounding hoses for cracks, blockage or wear.
6. Reinstall the rack and run a short wash cycle. Confirm the spray arm rotates freely and upper-rack cleaning is restored.

Use a qualified technician when diagnosis or installation is outside your experience.

Verified Compatible Models

KDTE204KBS2, MDB4949SKB1, MDB8959SKK0, MDB9959SKZ1

Fitment reminder: Match the complete model number, including suffixes and revision digits, before ordering. Fits select Whirlpool-manufactured dishwasher models. Contact us to verify your model number before ordering.