Model #MFW9700SB1 Maytag residential washers

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  • Pump And Motor Parts, Optional Parts (not Included)
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Error Codes

Error Code:



Question and Answers


Washer works fine for a while, then stops working properly, F-6 error code. What's wrong?


Make sure that the spin basket turns relatively freely and is not bound up.

The F-6 error code indicates that the CCU (Central Control Unit or main machine control board) cannot properly detect the drive motor speed. This can be caused by a wire harness failure between the CCU and the MCU (Motor Control Unit -- motor control board at the bottom of the washer). It can also be caused by a wire harness failure between the MCU and the drive motor. A failed drive motor, bad MCU or a defective CCU can also cause this failure. I provided technical information for these components in the first image below. The second image shows the wiring diagram for this washer. I recommend that you unplug the washer and check the wire harness connections between the CCU, MCU and drive motor first. If all of the connections are okay, you can check the resistance through the windings of the drive motor using the information provided below. You can check the resistance through the tachometer. I believe that the resistance is normally between 40K ohms to 50K ohms through that component but I am not sure. The technical information does not provide a resistance specification for the tachometer. If it is "open" (measures Ol -- open load or infinite resistance) then the drive motor will need to be replaced to fix this problem. If all of the wiring connections are good and the motor is okay then you may need to replace the MCU to fix this problem. There is no defined fix when the wiring connections are okay and the motor is good. If replacing the MCU does not fix the problem then you may need to replace the CCU. If both of the boards are replaced and you still have the same problem then the wire harness may need to be replaced.

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NOTE: This information is intended for technicians. Your screen name seems to indicate that you are a technician. Be sure that you follow electrical safety guidelines when using this information. Unplug the washer before accessing internal components. Internal metal edges in the washer can be sharp. Protective gloves are recommended.

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Lyle W -
Sears Technician
August 27, 2010