F38
Whirlpool Washing Machine
Severity: ModerateWhat Does This Error Mean?
The F38 error on a Whirlpool washer indicates a fault with the motor control unit — the electronic board that controls motor speed and direction. The control unit detected an abnormal condition and stopped the cycle to prevent damage. This usually requires professional diagnosis.
Affected Models
- WFW5620HW
- WFW8620HW
- WTW7120HW
- WFW9620HC
- Most Whirlpool front-load and top-load washers
Common Causes
- Motor control board has developed an internal fault or failure
- Motor hall sensor is sending an abnormal signal to the control board
- Drive motor winding has failed or shorted
- Wiring harness between the motor and control board is loose or damaged
- Power supply issue causing the control board to receive incorrect voltage
How to Fix It
-
Unplug the washer for 10 minutes to perform a full power reset.
Occasionally a power fluctuation triggers F38 without a real component failure. A reset clears temporary faults.
-
Make sure the washer is plugged directly into a wall outlet — not an extension cord or power strip.
Extension cords can cause voltage drops that confuse the motor control electronics and trigger fault codes.
-
Check that the drum is not overloaded.
An overloaded drum strains the motor and can trigger control board faults. Remove some items and try again.
-
Try to spin the drum by hand with the door open.
If the drum does not turn freely, there may be a mechanical issue causing the motor control board to overload.
-
If F38 returns after a reset with a normal load, call a technician.
The motor control unit, wiring harness, or motor itself needs professional testing. Do not continue running the machine.
When to Call a Professional
F38 is a motor control fault that almost always requires a technician. The motor control unit and motor wiring need to be tested before replacing parts. Expect repair costs of $150–$350 depending on which component is faulty.
Frequently Asked Questions
What is a motor control unit in a Whirlpool washer?
The motor control unit (MCU) is the circuit board that receives instructions from the main control board and translates them into precise power signals for the drum motor. It controls how fast and in which direction the drum spins. If it fails, the drum cannot operate correctly.
Is F38 a common error on Whirlpool washers?
It is less common than basic mechanical errors like drain or door errors. F38 tends to appear on machines that are several years old as electronic components age. Power surges can also trigger it on newer machines.
How much does it cost to replace a motor control board on a Whirlpool washer?
Motor control boards typically cost $80–$200 for the part. Labor adds $80–$150. Total repair cost is usually $150–$350. For washers older than 8–10 years, compare this against the cost of a new machine before committing to the repair.