Kenmore Washer F50 Error: Rotor Position Sensor Repair
Quick Answer
The F50 code signifies that your washer's motor sensor is not communicating with the control board. This is usually caused by a failed RPS sensor, a loose wiring harness, or a physical obstruction preventing the tub from spinning freely.
F50 basically means your washer's brain can't see the motor spinning. Ignore it and the machine just sits there locked up, clothes soaking in dirty water. I see this probably two or three times a month on these Kenmore direct-drive units. Nine times out of ten it's either the little plastic RPS sensor that's died or a connector that's vibrated loose over years of hard use.
OK so here's the deal with F50. It's not usually some catastrophic failure, and that's the good news. The rotor position sensor runs $40-60 online, and I've fixed this exact code probably a dozen times in the last couple months alone. Basically the washer's saying it can't tell if the motor is turning, so it stops everything to protect itself. Even if you're not super handy, you can tackle this with basic tools and about an hour of your time.
Most Likely Causes
Based on aggregated repair data, here is the probability breakdown for this error code:
Faulty RPS Sensor70%
Wiring or Connector Issues20%
Mechanical Obstruction5%
Main Control Board Failure5%
Symptoms You May Notice
Machine fills with water normally, then just hums for about 3-5 seconds before the lid locks and the code appears
Lid locks and won't release even when you hit Cancel. You might have to unplug it just to get your wet clothes out.
Drum feels stiff, rough, or catches when you try to hand-spin it with the lid open
Cycle was running fine for 10-15 minutes and then just stopped dead mid-wash with water still sitting in the tub
You can hear one loud click from the motor trying to engage, then silence, then the error code shows up on the display
Can you reset a Kenmore washer to clear the F50 code?
After you fix the actual problem, here's how to clear it. Press Stop or Cancel twice. Then physically unplug the machine from the wall outlet, don't just flip a breaker, actually pull the cord. Leave it unplugged for 10-15 minutes so the control board fully discharges and clears the fault memory. Plug it back in, pick a short cycle, and let it run. If it starts spinning without throwing F50 again, you nailed it.
Tools Required for Diagnosis
Phillips #2 screwdriver1/4 inch nut driver5/16 inch nut driverFlathead screwdriverDigital multimeter10mm socket and ratchet7/16 inch socket or adjustable wrench (for rotor bolt)Flashlight or headlampTorque wrench (optional but helpful for rotor bolt reinstall)
Diagnostic Checklist
Follow these steps in order. We start with the easiest external fixes before opening up the machine.
ComponentComponent Under Test
Expected Range100–300 ohms
ConditionIf Open (OL) or infinite, replace component.
Frequently Asked Questions
Can I still use the washer if it shows F50?
Nope. Once F50 hits, the lid locks and nothing starts. That's actually the machine protecting itself. If the motor ran without position feedback, you'd fry the stator coils, and replacing those costs way more than a $50 sensor. You might be able to rescue your wet clothes by unplugging the machine and manually releasing the lid lock mechanism, but don't try running another cycle until you've fixed the underlying problem.
Is the F50 error code the same as a uL code?
Different problems. uL is just an unbalanced load and usually clears when you redistribute the clothes and try again. F50 is an actual communication failure between the motor sensor and the board. That said, I've seen machines that got beat up from repeated violent imbalance events, and the vibration eventually shook the RPS connector loose enough to cause F50. So uL can set the stage for F50 over time. Fix the F50 first, then make sure you're not regularly overloading the machine.
Where exactly is the RPS sensor on a Kenmore washer?
It's clipped right onto the stator assembly at the very bottom of the washer. You have to tip the machine back, pull the center rotor bolt, lift the rotor off, and the RPS sensor is sitting right there on the stator facing you. Small plastic piece, 3-wire connector. Takes maybe 10 minutes to get to once you know where you're going. The part number WPW10183157 fits a huge number of these Kenmore direct-drive models.
Why does my washer hum for a few seconds before showing F50?
That hum is the motor actually trying to fire up. The board sends the spin command and the motor attempts to respond. But the RPS isn't reporting back any movement confirmation, so after a few seconds the board decides something's wrong and cuts power before the stator overheats. Honestly that protection circuit is doing exactly what it's supposed to do. Without it you'd be looking at a stator replacement instead of a $50 sensor. The hum tells you the motor itself is probably fine.
How much does it cost to fix an F50 error?
DIY route, the RPS sensor runs about $40-80 depending on where you buy it. Total repair is maybe $50-60 parts plus an hour of your time. Professional route, figure $200-350 all in once you add the service call, labor, and the shop markup on the part. Honestly this is one of the more DIY-friendly repairs on these machines. If you've ever changed a car battery or swapped out an outlet, you can handle this.
Can a bad control board cause the F50 code instead of the sensor?
It can, but it's pretty rare. I'd say maybe 5% of F50 calls actually end up being a board issue. Always replace the sensor and check the wiring first because control boards run $150-250 and you don't want to throw one at a problem that a $50 sensor fix would've solved. If you've replaced the sensor, confirmed good connections, and the code still comes back within a cycle or two, then yeah, the board's worth looking at.
Models Known to Experience F50 Errors
This repair applies to most Kenmore washers with this error code. Common model numbers include: