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Thread: WGD6400SW1 Motor Turns, stops after 5 seconds

  1. #1
    Join Date
    May 2018
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    CA
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    Default WGD6400SW1 Motor Turns, stops after 5 seconds

    Model Number: WGD6400SW1
    Brand: Whirlpool
    Age: 6-10 years

    Greetings,

    Troubleshooting this gas dryer, model WGD6400SW1. The drum turns, then stops after about 5 seconds. If don't reset it, the motor will start again after 20-30 seconds, and stop again after 5 seconds. The front panel SENSOR indicator comes up, but no codes. I traced it to the motor, which had the broken Centrifugal switch (apparently common to p/n 8566152). There was a smell of something burning that seemed like it came from the motor. I replaced the motor with the newer p/n. After putting everything back together, the same symptoms are present, including the smell. Replaced the Solenoid coils just because.

    Also, unable to enter the diagnostic test mode.

    How should I proceed?

  2. #2
    Join Date
    Aug 2004
    Location
    McMullen Valley, Arizona
    Posts
    92,858

    Default

    Hi,

    The manufacturer has replaced part number 8566152 with part number WPW10463866

    I traced it to the motor, which had the broken Centrifugal switch (apparently common to p/n 8566152).
    It's extremely rare to ever see the Centrifugal switch break on dryer motors. Usually they just wear out in time with the motor bearing wearing out, thus the motor grinds to start or hums and won't start.

    Did you remove the belt and the blower wheel from the motor and just run the motor alone?

    I need to ask bigbick if he has the tech. data sheet for this model.

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  3. #3
    Join Date
    Mar 2015
    Location
    From Planet Mars
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    Default

    Here you go.
    Attached Files Attached Files

  4. #4
    Join Date
    Jul 2006
    Location
    Murray, Utah 84107, United States
    Posts
    30,235

    Default

    It sounds like the motor relay on the control board is going to be the problem. You have the start stop issue plus it won't go into diagnostic mode and a control board failure is common on that style machine. The burning smell most likely left it's calling card somewhere obvious. If you remove the control board and take it out of the bracket you'll probably see it.
    Control Board WPW10111617
    Click image for larger version. 

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    OWNER RICK'S APPLIANCE REPAIR
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  5. #5
    Join Date
    May 2018
    Location
    CA
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    Default

    Bigbuck, thanks for the tech sheet.

    I actually did check the board. it looks new and there is no smell coming from the board.

    I'm a tech so i expected to find the same thing. I have the equipment and know how to replace the relay (and redo the conformal coating). I will take the board to work tomorrow and check the relay.

    Can there be a problem with the wire harness with these machines?

  6. #6
    Join Date
    Jul 2006
    Location
    Murray, Utah 84107, United States
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    Default

    The control board is responsible for diagnostic test mode so lets make sure you entering the test mode correctly.

    First unplug the machine for 30 seconds then plug it back in. Open and close the door.

    The dryer should be in standby mode, plugged in and all the LEDs off.

    Select any button except Pause/Cancel:

    Press and hold for 2 seconds - release for 2 seconds - Press and hold for 2 seconds - release for two seconds - Press and hold for 2 seconds.

    Too fast or too slow will result in an unsuccessful entry and you'll need to start over. Use a different button and try again.

    If the diagnostic mode was entered successfully, all the indicators on the console will illuminate for 5 seconds and 8:88 will be shown in the display

    If there are no stored fault codes or active fault codes all the indicators will momentarily turn off then stay on and 8:88 will be shown in the display.

    If there is an active fault code, it will be flashing in the display. Use the same button to cycle through any stored codes.

    Press Pause/Cancel to exit test mode.

    Still can't get into diagnostic test mode, no problem. It's easy enough to check. (assuming you don't have anything miswired)

    Access the main board and measure the voltage across P9-2(blk) - P8-3(white). Your meter should show 120 VAC. If not check the power cord.

    Measure the voltage across P9-2 (black wire) and P8-4 (tan wire). Meter should indicate 120 VAC. If not replace the door switch.

    Touch/hold the meter leads to P9-1 and P8-4 Start the machine on timed dry, air fluff (no Heat). Meter should indicate 120 VAC

    When the motor stops running:

    If the voltage remains at 120 VAC after the motor stops, replace the belt switch or temporarily bypass it and recheck/restart the dryer. If the motor stops again replace the motor.

    If the voltage changes when the motor stops , set your meter to measure VDC.

    Measure across P5-8 to P2-1 and P2-3 (meter should indicate +12V or -12V) If the voltages are correct replace the UI. If the voltages are not correct replace the main board.

    MOTOR DIRECT TEST
    You can direct test/start the motor with a cheater/test cord. Unplug the motor wire harness connector and connect the test cord to M5 and M4 The motor will run continuously until you remove the test cord. If not replace the motor.
    OWNER RICK'S APPLIANCE REPAIR
    APPLIANCE TECHNICIAN FOR 31 YEARS
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