Why is my dishwasher spray arm not spinning?

The spray arm might be clogged with food debris, obstructed by dishes, or have a damaged bearing or mounting point. Check for blockages and ensure it's properly seated before considering part failure.

Can I clean a clogged dishwasher spray arm?

Yes, remove the spray arm and clear any visible debris from the spray holes using a toothpick or small wire. Run water through it to ensure all holes are clear. This often restores proper function.

How often should I replace my dishwasher spray arm?

Spray arms typically last many years and do not require routine replacement. Replace it only when you observe symptoms like poor cleaning, visible damage, or if it stops spinning correctly despite being clear of obstructions.

Dishwasher Spray Arm Replacement & Repair

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🏆 RECOMMENDED PART

Whirlpool WPW10571949 Genuine OEM Dishwasher Center Wash Arm Support Replacement Part - Replaces W10571949

GENUINE OEM: Whirlpool Genuine OEM Parts are designed specifically for your appliance, meet Whirlpool engineering standards, and are crafted to ensure the quality of your appliance, unlike non-OEM parts
REPLACEMENT PART NUMBERS: WPW10571949 Dishwasher Center Wash Arm Support replaces the part number W10571949
COMPATIBLE APPLIANCES: WPW10571949 is compatible with multiple Whirlpool models, including MDB4949SDM, MDB4949SHZ, MDB4949SDZ, MDB4949SDH, and MDB4949SDE
ONE YEAR WARRANTY: Don’t settle for aftermarket parts , Whirlpool offers the well-tested, high quality parts that your appliances deserve with a one-year warranty
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What the WPW10571949 does

The spray arm rotates and sprays water under pressure to clean dishes inside the dishwasher. It ensures water reaches all areas of the wash tub during cycles.

Symptoms when this part fails

Dishes not getting clean
Water not spraying correctly
Unusual noises during wash cycle
Spray arm not spinning
Visible cracks or damage on spray arm

Compatibility

Fits the Whirlpool family. Specifically:

Any unit originally equipped with OEM part number(s): W10571949.
Check the model/rating plate inside your appliance and compare it against the fitment table on the product listing before ordering — this guide does not list specific compatible models because Amazon does not provide verified fitment data through this pipeline.

Also replaces: W10571949

Tools you'll need

Pliers
Screwdriver
Work gloves

Difficulty: Easy · Time: 15-30 minutes

How to install the WPW10571949, step by step

Disconnect dishwasher from power supply.
Open dishwasher door and remove lower dish rack.
Locate and remove the old spray arm, often by unscrewing a retaining nut or simply lifting it off a support.
Clean any debris from the spray arm's mounting point.
Place the new spray arm onto its support post or attach it with the retaining nut.
Ensure the new spray arm spins freely.
Replace the lower dish rack and close the dishwasher door.
Reconnect power and test the dishwasher.

Related troubleshooting

If swapping this part doesn't fix the issue, check these next: