Whirlpool washer F51: motor position sensor failure
F51 (F, then 51) means the motor's rotor position sensor failed or its lower wiring harness has a problem.
What F51 means
- Brand
- Whirlpool
- Appliance
- Top-load washer
- Code
- F51
- Documented meaning
- Motor position sensor failure
- Applies to
- 45 Whirlpool models on 3 platforms
- Can you keep using it?
- No — stop and have it checked
What the washer is detecting
The control relies on the rotor position sensor to run the motor. A missing or invalid sensor signal makes F and 51 flash.
Causes listed for this condition
In the order the service documentation checks them. Documented causes come from the manufacturer's service documentation for these platforms; possible causes are based on how the system works; unconfirmed marks common assumptions that the documentation does not support.
- Documented A failed rotor position sensor or a fault in the lower harness, checked with the drive test.
Safe checks you can make
- Unplug the washer for one minute, plug it back in and start a new cycle. If the code comes straight back, the condition is persistent and needs diagnosis.
Further diagnosis requires opening the appliance. Beyond the owner checks, diagnosis involves removing panels, testing components and checking wiring. We describe what a technician investigates, not how to do it yourself.
What a technician checks
- Runs the drive test.
- Checks the lower harness and sensor connections.
Typical repairs and cost
Depending on what diagnosis finds, this code can lead to one of these repairs:
| Repair | Typical range | Labor |
|---|---|---|
| Washer drive motor replacement | $300–$720 | Heavy |
Typical total ranges for the Las Vegas area, parts and labor included. The final cost depends on diagnosis, the exact model, parts availability and whether other damage is found.
Can you keep using it?
Stop using it until it is checked. The washer cannot run the motor properly. Stop using it and have it diagnosed.
Whirlpool models documented with this code
- WTW6200SW
- WTW6200VW
- WTW6300SB
- WTW6300SG
- WTW6300SW
- WTW6300WW
- WTW6310WW
- WTW6340WW
- WTW6400SW
- WTW6410WW
- WTW6500WW
- WTW6600SB
- WTW6600SG
- WTW6600SW
- WTW6700TU
- WTW6700TW
And 29 more. Use the model lookup to check yours.
Related problems and codes
Other codes documented on the same Whirlpool platforms:
Repair or replace?
A fault code alone rarely justifies replacing a washer. Most F51 repairs involve a single component once diagnosed. Replacement becomes worth considering when the unit is near the end of its typical 10–13-year life and the diagnosed repair is a major one. See the repair-or-replace guide.
Need F51 diagnosed in the Las Vegas area?
We repair Whirlpool, Maytag, KitchenAid, JennAir, Amana and other Whirlpool-family appliances in Las Vegas, Henderson, Summerlin and Boulder City. A model number helps but is never required to book.