Question about Kenmore Elite 45986 Front Load Washer

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What F 11 code means - Kenmore Elite 45986 Front Load Washer

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F11 = Serial Communication Error. Communication between the Central Control Unit (CCU) and the Motor Control Unit (MCU) cannot be sent correctly.

Check Wire Harness connectors to the MCU, the motor, and Central Control Unit (CCU)

Check the Drive system for any worn or failed components

Check MCU

Check CCU

Check Motor

Check Wire Harness

Most likely is a problem on the controller board due to vibration. If you are habdy, and wish to try repairing the board instead of replacing it, take the top cover off, then pull the white relays ( there are 2 Omron ones K1 and K4).
You have to remove the solder and then pull them off. I can almost guarantee one is burned. Clean off with a pencil eraser or scrape with an Exacto knife... then switch them as one of them carries a lot less voltage, therefore doesn't burn.
You need a fine tip soldering gun for re-soldering or you may burn the circuit board. This may get through a year or two more before you have to replace these relays.
If you are handy, you can do it yourself. The repairmen will only want to replace the whole CCU board and that is expensive.

Good Luck!!

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Posted on Jun 17, 2009

  • blueextc3221
    blueextc3221 Jun 17, 2009

    From Whirlpool Direct (same washer - different branding)

    "F11" is a Serial Communications error between the Central Control Unit (CCU) and Motor Control Unit (MCU). The CCU is the main computer
    for the washer and is located directly behind the wash tub. The MCU is
    the Drive Motor Control board and is located in the rear of the washer
    adjacent to the Drive Motor on the left-hand side (facing from the rear
    with the back panel removed). The wiring harness can also cause the
    error, but it is not as common a problem.

    is the manufacturer of both model washers and recommends the following
    troubleshooting advice. Remove the top panel of the washer by removing
    the three screws holding it in place in the rear. Once the screws are
    removed, the panel slides back, then off. Remove the rear panel of the
    washer for access to the drive motor and MCU. Now check the following:
    - Check the wire harness

    connections between the CCU, the MCU and Drive Motor. Make sure all
    connections are attached and making good contact. Check for any broken
    wires or connector pins.
    Check the Drive Motor to see if it free spins and that the belt is
    still attached and not slipping. If the motor is seized, replace it. If
    the belt is broken or worn, replace it as well.
    - Check the MCU.
    Connector 1 is the Serial Communications Link between the MCU and CCU.
    Connector 2 is the connector to the drive motor. Resistance checks
    across pins 1, 2, & 3 are the motor windings. Connector 3 is the power supply
    - 120VAC should be read across pins 1 and 2 with the door in the locked
    position. NOTE: The connectors are read 1, 2, and 3 from the bottom to
    the top with the MCU installed.
    - Check the CCU. Verify connectors 7
    and 11 are properly installed. Facing from the front of the washer,
    connector 7 is the 4th connector from the RIGHT along the front. This
    is MCU Power. Connector 11 is the Serial Communications link from the
    CCU to the MCU and is located along the left hand side of the CCU (the
    connectors are numbered 11 through 14 back to front).
    - Check the
    Drive Motor. Remove the connector and perform resistance checks on the
    motor connector pins. Readings across pins 1 to 2, 2 to 3 and 1 to 3
    should read 6 ohms.
    In most cases this is an indication of a
    failed CCU. This is an easy repair that the average do-it-yourselfer
    can accomplish on their own.



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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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