F6
Whirlpool Washing Machine
Severity: CriticalWhat Does This Error Mean?
The F6 error means your Whirlpool washer's tachometer has failed. The tachometer measures how fast the motor is spinning. Without a working tachometer, the control board can't verify the motor speed — so it stops the cycle. This is a critical error because the washer cannot spin safely without speed feedback.
Affected Models
- WFW5620HW
- WFW9620HC
- WFW8620HC
- WFW6620HW
- Whirlpool front-load washers
Common Causes
- Tachometer coil has broken or burned out inside the motor assembly
- Wiring harness from the tachometer to the control board is loose or damaged
- Motor brush wear causing erratic speed signals that confuse the tachometer circuit
- Control board fault causing it to misread the tachometer signal
- Foreign objects jammed in the drum causing the motor to stall unpredictably
How to Fix It
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Cancel the cycle and unplug the washer immediately.
Do not keep restarting the washer with a tachometer error. The motor may overspeed or underspeed without proper feedback control, risking further damage.
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Check for any obvious overloading in the drum.
An extremely heavy load can stall the motor temporarily, causing the tachometer to report zero speed. Remove some laundry and try a reset before calling a technician.
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Inspect for foreign objects inside the drum.
Look between the drum and the door seal for coins, buttons, or small items. Anything jamming the drum can cause stalling that mimics a tachometer fault.
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Unplug the washer for 15 minutes, then plug back in and try an empty spin cycle.
An empty cycle with no laundry confirms whether the tachometer is truly faulty or whether a load issue was triggering the error.
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If F6 returns on an empty cycle, call a technician to inspect the motor and tachometer.
The technician will use a multimeter to test tachometer resistance and check the wiring harness. This is not a repair most homeowners can safely do themselves.
When to Call a Professional
The tachometer is attached to the motor and requires disassembly to access. F6 is not a user-serviceable error in most cases. A licensed appliance technician can test and replace the tachometer or motor assembly. Expect repair costs of $150–$350 depending on whether just the tachometer or the entire motor needs replacing.
Frequently Asked Questions
What exactly does a tachometer do in a washing machine?
The tachometer is a sensor attached to the motor. It generates a small electrical signal each time the motor rotates. The control board counts these signals to calculate the motor's exact speed in RPM. This is how the washer knows whether to slow down, speed up, or maintain the correct spin speed. Without it, the control board is blind to motor speed and cannot run safely.
Is a tachometer the same as a speed sensor?
Yes — in appliance terminology, tachometer and speed sensor are the same component. It may also be called a motor hall sensor or RPM sensor on some models. Regardless of the name, it does the same job: measures how fast the motor is turning. Whirlpool's service documentation typically calls it a tachometer.
Can I replace the tachometer myself?
It's possible for experienced DIYers. The tachometer is mounted on the motor and accessed from inside the washer cabinet. You need to remove the drum and motor assembly to reach it on most Whirlpool front-load models. For most homeowners, this repair is better left to a technician.