Whirlpool Washer Rotor Position Sensor WPW10178988, Replaces W10178988, W10137685

Genuine Whirlpool OEM motor rotor-position sensor, also described as an RPS sensor. It mounts at the washer motor stator and monitors rotor direction and speed for the electronic control board.

Is This the Right Part?

✅ Cross Reference Information

Common Symptoms

• Washer will not spin
• Washer will not agitate
• Cycle stops or fails when spin begins
• Clothes remain excessively wet after the cycle
• F51 rotor-position-sensor fault code may appear

Check Before Replacing

• Disconnect electrical power before inspection.
• Confirm that the basket turns freely by hand; mechanical binding can produce similar motor-position faults.
• Inspect the rotor-position-sensor connector and lower motor harness for loose connections, damaged wiring, corrosion, or visible contamination.
• If the washer’s service procedure calls for electrical testing, check continuity through the sensor circuit and harness only with power disconnected; do not replace the sensor based on symptoms alone.
• Use the washer’s applicable diagnostic motor or spin test, if provided by its model-specific service documentation, to distinguish a sensor or harness issue from a motor or control problem.

Pro Tip

Part Details

Key Features

• Genuine Whirlpool OEM rotor position sensor/RPS assembly
• Mounts at the washer motor stator beneath the rotor
• Designed for direct replacement of the archived predecessor numbers W10178988 and W10137685
• Used on Whirlpool and Maytag direct-drive top-load washer platforms

Installation Notes

• Disconnect power and water supplies before accessing the underside of the washer.
• Access the motor assembly and rotor-position sensor at the stator beneath the rotor.
• Disconnect the sensor wiring connector and remove the existing sensor according to the model-specific service procedure.
• Install the replacement sensor in the original mounting position, reconnect the harness securely, and reassemble the motor components.
• Run the applicable diagnostic or spin test after reassembly to verify operation.

Verified Compatible Models

7MMVWB850WL0, 7MMVWB950AG0, 7MWTW7800XW0, 7MWTW8800AW0, MVWB300WQ1, MVWB300WQ2, MVWB450WQ1, MVWB455YQ0, MVWB700BW0, MVWB725BG0, MVWB725BW0, MVWB750WB1, MVWB750WL1, MVWB750WQ1, MVWB750WR1

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