Chosen Solution

My Whirlpool WFW9150WW01 Duet washer won’t speed fast? === ===

@rmejia65 could be an issue with the belt, the motor or the control board (MCU motor control unit). First I’d check to see if the belt is on tight . If it is to loose it will slip and not properly drive the drum.

Next you want to check the drive motor.

  1. Unplug washer or disconnect power.
  2. Disconnect the 5-wire connector from the drive motor.
  3. Set the ohmmeter to the R X 1 scale.
  4. Touch the ohmmeter test leads to the following motor pins. For each measurement, the meter should indicate approximately 6 Ω: Pins 1 and 2 Pins 2 and 3 Pins 1 and 3 You can also do this after the belt check. Run the diagnostics tests by following these instructions Diagnostics-Mode.pdf Let us know what you find.