Question about Whirlpool GHW9200L Front Load Washer

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Whirlpool Duet not spinning. motor, or ??

I have a whirlpool washer that i picked up used. Upon testing, itwouldn't spin/agetate/ anything involving the motor. Got an error F06.Tach sensor or something similar. After doing some internet research, iwas led to believe it was the MCU. MCU is now replaced. Now, i can hearwhen the motor tries to kick on, but it never kicks over. (you knowthat faint high pitched noise you hear from a TV or monitor when its on, buttheir is no noise in the room?? thats the noise). I can see the drum hub and motor pulleys wiggle back and forth very slightly as its attempting to start.

I can turn the motor/hub pulley fine in both directions, with minimal effort. When I hearthe noise of the motor trying to start, if i reach back and give that"hub pulley" a little jump start by hand, then it will work. however, it will onlyfinish the high speed spin cycle. any lower speed spins or agitationcycles, and it will work momentarily, and shut back off. atwhich point it needs my assistance again to get started, or error code F06 ensues after a few failed attempts.

I tested the 3 pins on the motor harness that are listed on the tech sheet with a multimeter. it says they should test at ~6 ohms. they all three tested at 6.4-6.5 ohms, so I guess that is okay. Also, since replacing the MCU, i've noted that the cycle indicator LED is flashing (the one the main dial points to). I don't believe it was blinking before the MCU was replaced. I can still select and start cycles, however.


any help is appreciated, as I am stumped, and most definately not an appliance mechanic! ...and sorry for the exceedingly long post!

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  • murraywp Apr 24, 2009

    i was told by a repairman, i needed a CCU and Motor, the cost would be 700$+ parts and labor. more than a new washer, motor works fine, except @spin i get the f 06 error and it shuts down,
    all help is appreciated
    Murray

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The error is an indication a motor speed problem. You will need to check the following:

- Check the wiring harness. Verify all connections between the Drive Motor, Motor Control Unit (MCU), and Central Control Unit (CCU).

NOTE: The MCU is a circuit board located in the vicinity of the Drive Motor on the bottom rear of the washer. To access the MCU, you will need to remove the back panel of the washer.

NOTE: The CCU is the main computer for the washer and is located behind the wash tub. You will need to remove the top panel to access the CCU. This is accomplished by removing the three screws in the back of the washer that hold the top in place. Once the screws are removed, the top panel will slide back, then lift off.

- Check the Drive Motor. Perform a continuity check of the Drive Motor windings. Remove the connector plug and check across pins 1 to 2, 2 to 3, and 1 to 3. All readings should be approximately 6 ohms. HINT: You can also take this reading by removing connector 2 from the MCU and measuring across pins 1, 2 and 3. If the readings are good, this will also prove the wiring and connector good.

- Check the MCU. The connectors are numbered 1 to 3 (L to R). That is, with the MCU installed, connector 1 is on the bottom, followed by 2 in the middle, and 3 on top.

Connector 1 - is the serial communications link between the MCU and CCU and has three wires. At the opposite end, this will be the 2nd connector from the rear on the left-hand side of the CCU.
Connector 2 - is the link between the MCU and the Drive Motor. Pins 1, 2, and 3 on this connector are the Drive Motor windings. Pins 4 and 5 are for the tachometer.
Connector 3 - is the primary power connector. Pins 1 to 2 should read 120VAC with the door in the locked position. Pin 3 is ground. At the opposite end, this is the 4th connector from the right on the front of the CCU.

NOTE: All the connector pins are numbered R to L.

If your continuity readings are normal for the Drive Motor and you have verified all connectors, replace the MCU.

If any of the Drive Motor windings indicate readings higher that 6 ohms, replace the Drive Motor.


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Posted on Sep 21, 2010

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