Question about Whirlpool GHW9300 Duet Washer

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F 11 error code on Whirlpool Duet - Serial Communication Error ?

My washer sometimes gives an F11 error code-"serial communication error".  It still works, but I'd like to resolve the problem before it breaks completely.  Is this something I can fix? How do I start troubleshooting? what model number are you having these issues with. I have a GHW9300. And how much was the replacement component?

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  • Anonymous Apr 20, 2009

    tech said only repair is to replace both units.... over $700!!! What a rip off!!!! Seems like a common problem too... beware!!!

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Your F11 Code is stateing these things but if it is intermittent probabbly a loose connection.


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

Posted on Feb 10, 2009

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SOURCE: F 11 error code on Whirlpool Duet - Serial Communication Error ?

I believe EVERY machine will have this F11 error eventually. Here is what fixed mine. Remove the top cover by removing the three 7mm screws on the back of the machine at the top. Slide the cover to the rear and lift off. The CCU board has 2 relays on it. They have white plastic covers. One is labeled K4 and I believe the other is K2. There are five legs on each relay soldering them to the circuit board. Remove the circuit board from the machine. It is the one you can see with the top off in the back of the machine. Unplug all the connectors. Unsolder the 2 relays...brand name Omron. With a jewelers screwdriver carefully remove the plastic cover on the K4 relay. Examine the contact points on the normally open contacts and I will guarantee they will look dull and burnt. They should be bright and shiny. You can burnish the contact points lightly and clean them with electrical contact cleaner. If you take off the cover of the 2nd relay you will see the contact points are nice and bright and shiny. Swap the 2 relays and resolder them on the circuit board. While you have the board out, take a pencil eraser and rub it on the contact points where all the connectors slide onto the board. Spray the electrical contact cleaner to wash any residue away. Carefully reinstall the circuit board and replace the top cover. Our machine has done dozens of loads since I did this with no more problems. I expect another failure at some point when the points deteriorate on the swapped relay. At that point I will try and find replacements for both relays. The K2 relay apparently has less voltage going thru the contacts and does not fail. If you feel real comfortable, you can check the "wiping" action of the points by manually operating the relay when you have it out. I adjusted mine to give a bit more wipe on both relays. I hope this helps...it worked for me!!

Posted on Jan 10, 2009

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Posted on Jan 02, 2017

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WHAT MEANS ERROR CODE FOR MY DRYER MACHINE F11?


Communications error.

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  • Jan 30, 2016 | Dryers

    1 Answer

    We have a Duet that is 2yr 2 month old the washer will not spin and give a F11 code. What do I do?


    HELLO THERE
    F/11 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

    Oct 04, 2010 | Whirlpool Duet GHW9150P Front Load Washer

    1 Answer

    F11 and/or dl code on a whirlpool duet front load washer


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

    http://www.fixya.com/support/r666194-f11_error_whirpool_duet_kenmore_elite

    Check the above link for a detailed article about the f11 error code.
    Courtesy:JSrock

    Apr 01, 2010 | Whirlpool Duet GHW9150P Front Load Washer

    1 Answer

    F11 Code Showing


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

    Check for:
    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

    http://www.fixya.com/support/r666194-f11_error_whirpool_duet_kenmore_elite

    Check the above link for a detailed article about the f11 error code.

    Courtesy:JSrock

    Mar 28, 2010 | Whirlpool Duet GHW9150P Front Load Washer

    1 Answer

    The F11 error. Where is bottom panel?


    f11 serial communication error.communication between the central control unit {ccu} and the motor control unit {mcu} cannot be sent correctly.

    Jan 15, 2010 | Whirlpool Duet GHW9150P Front Load Washer

    1 Answer

    Error code F11


    Not sure what machine you have?

    F11 Error Code for Whirlpool Duet & Duet HT :

    F11 is Serial Communication Error, communication between the central control and the motor control unit cannot be sent correctly.

    Check all connectors at the motor control and the Main control, check the motor, check drive system for any worn or failed components.

    This is the only F11 Error code I could find for a washer.

    Jan 13, 2010 | Dryers

    1 Answer

    Whirlpool ghw9150pwo f11 error code


    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

    Nov 04, 2009 | Whirlpool Duet GHW9150P Front Load Washer

    1 Answer

    Older whirlpool duet washer has error F11


    F11 is a serial communication error between the central control unit and the motor control unit.
    Unplug the machine and open the panels.
    Unplug and re-plug all wire connectors from the ccu to the mcu.
    Inspect all wires and harnesses for a bad wire.
    Could be bad components; ccu or mcu or motor

    Feb 23, 2009 | Whirlpool Duet GHW9150P Front Load Washer

    1 Answer

    ERROR F11 (Whirlpool Duet GHW9300)


    Hi there this is as it reads for your fault code 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

    Feb 10, 2009 | Whirlpool GHW9300 Duet Washer

    1 Answer

    Washer stops


    F/11 Serial Communication Error
    Communication between the Central Control Unit (CCU) and the Motor Control Unit (MCU) cannot be sent correctly.
    globul1a.gif Check Wire Harness connectors to the MCU, the motor, and Central Control Unit (CCU) globul1a.gif Check the Drive system for any worn or failed components globul1a.gif Check MCU globul1a.gif Check CCU globul1a.gif Check Motor globul1a.gif Check Wire Harness

    May 25, 2008 | Whirlpool Duet GHW9150P Front Load Washer

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