Samsung Dishwasher WaterWall spray arm motor / geared motor DD31-00013B, Replaces DD31-00013A

Genuine Samsung geared motor that turns the belt to move the WaterWall spray arm forward and backward inside the dishwasher tub. Documented specifications from a parts retailer identify a 4-pin Molex connector, 120 V, 8.0 W, 30 RPM, and D-shaped shaft.

Is This the Right Part?

✅ Cross Reference Information

Common Symptoms

• Poor or uneven cleaning, especially on one side of the rack
• WaterWall belt does not turn or slips off the motor gear
• Grinding or humming from the lower tub area during washing
• Dishwasher completes a cycle but cleaning performance remains poor

Check Before Replacing

• Disconnect electrical power before inspection.
• Check the WaterWall arm and track for visible obstructions or binding without forcing the mechanism.
• Inspect the drive belt for breakage, cracking, stretching, or slipping off the motor gear.
• With power disconnected, verify that the motor wiring connector and harness are fully seated and show no visible damage.
• If the belt and mechanism appear intact, use the appliance's approved test procedure or service documentation to observe WaterWall movement; do not assume the motor is faulty from symptoms alone.

Pro Tip

Part Details

Key Features

• Genuine Samsung WaterWall spray-arm geared motor
• 4-pin Molex connector
• 120 V, 8.0 W, 30 RPM specification
• D-shaped shaft
• Drives the WaterWall belt rather than directly spraying water

Installation Notes

• Disconnect the dishwasher from electrical power and shut off the water supply before servicing.
• Wear protective gloves when accessing the motor and WaterWall assembly.
• Verify the appliance model before installation.
• After access is gained, reconnect the wiring harness securely and ensure the belt is correctly seated on the motor gear before reassembly.
• Follow the model-specific service documentation for removal and reassembly; do not force the WaterWall mechanism.

Verified Compatible Models

DW60M9990AP/AA, DW80H9930MO/AA-0000, DW80H9930US/AA-0000, DW80H9930US/AC-0000, DW80H9930US/AC-0001, DW80H9940US/AA, DW80H9940US/AA-0001, DW80H9950US/AA, DW80H9950US/AA-0000, DW80H9970MO/AA-0000, DW80H9970US/AA-0000, DW80H9970US/AA-0001, DW80H9970US/AA-0002, DW80H9970US/AC-0000, DW80H9970US/AC-0001, DW80H9970US/AC-0002, DW80J7550UG/AA, DW80J7550UG/AA-0001, DW80J7550US/AA, DW80J7550US/AA-0000, DW80J7550US/AA-0001, DW80J7550US/AC, DW80J7550US/AC-0001, DW80J7550UW/AA-0001, DW80J7550UW/AC, DW80J9945MO/AA-0001, DW80J9945US/AA, DW80J9945US/AA-0001, DW80J9945US/AC, DW80J9945US/AC-0001, DW80J9945US/AC-0002, DW80M9550UG/AA, DW80M9550UG/AA-0000, DW80M9550US/AA, DW80M9550US/AA-0000, DW80M9960UG/AA, DW80M9960UG/AA-0000, DW80M9960US/AA, DW80M9960US/AA-0000, DW80M9990UM/AA, DW80M9990US/AA, DW80R9950UG/AA-0000, DW80R9950UG/AC-0000, DW80R9950US/AA-0000, DW80R9950US/AC-0000, DW80R9950UT/AA-0001, DW80H9930MO/AA, DW80H9930US/AA, DW80H9930US/AA-0001, DW80J7550UG/AC, DW80J7550UW/AA-0000, DW80J7550UW/AC-0001, DW80J9945MO/AA, DW80J7550UW/AA, DW80J9945US/AA-0000, DW80R9950UG/AC-0001, DW80R9950US/AA-0001, DW80R9950US/AC-0001, DW80R9950UT/AA-0000, DW80R9950UG/AA-0001, DDW24M999UM, DDW24M999US, DDW24T999BB, DW60M9990AP, DW80H9930MO, DW80H9930US, DW80H9940US, DW80H9950US, DW80H9970MO, DW80H9970US, DW80J7550UG, DW80J7550US, DW80J7550UW, DW80J9945MO, DW80J9945US

Fitment reminder: Match the complete appliance model number, including suffix or revision where applicable, before ordering.