Customer Questions and Answers for Rotor Position Sensor by Whirlpool

Hello Benjamin. F then 51 flashes when there is a motor rotor position sensor (RPS) failure or lower harness problem. This test checks the wiring to the motor and rotor position sensor; and the motor and rotor position sensor themselves. NOTE: Drain water from tub. 1. See Activation of Manual Diagnostic Test Mode, page 2 and check the motor and electrical connections by performing the Spin test under Manual: Motor. The following steps assumes that this step failed. 2. Unplug washer or disconnect power. 3. Check to see if basket will turn freely. ? If basket turns freely, go to step 4. ? If basket does not turn freely, determine what is causing the mechanical friction or lock up. 4. Remove the console to access the machine/motor control assembly. See Accessing & Removing the Electronic Assemblies. 5. Visually check that the P5 and P10 connectors are inserted all the way into the machine/motor control. ? If visual checks pass, go to step 6. ? If visual checks fail, reconnect P5 and P10 and repeat step 1. 6. Visually check that the P5 and P10 connectors are inserted all the way into the machine/motor control. 7. Tilt washer forward to access the bottom of the washer and the drive motor area. Remove the motor bolt, then the motor cover to access the motor connections. 8. Visually check the mounting bracket and electrical connections to the motor and rotor position sensor board. ? If visual check passes, go to step 9. ? If visual check fails, reconnect the electrical connections, reassemble stator and motor cover and repeat step 1. 9. With an ohmmeter, check for continuity between all pins on the P10 machine motor control connector and the motor rotor position sensor (RPS) connector. ? If there is continuity, check the motor windings. If the motor windings are open, replace the drive motor. ? If there is no continuity, replace the lower machine harness. 10. With an ohmmeter, check for continuity between all pins on the P5 machine/motor control connector and the drive motor connector. ? If there is continuity, replace the drive motor. ? If there is no continuity, replace the lower machine harness. 11. The drive motor and lower harness are good. Replace the motor RPS board and perform the Diagnostics test in step 1 to verify repair. 12. If the Diagnostics motor test in step 1 failed, then the machine/motor control has failed: ? Unplug the washer or disconnect power. ? Replace the machine/motor control assembly. ? Perform the Motor Diagnostics in step 1 to verify repair.