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Thread: Whirlpool Duet Dryer WED8300SB1 Won't Start

  1. #1
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    Default Whirlpool Duet Dryer WED8300SB1 Won't Start

    Model Number: WED8300SB1
    Brand: Whirlpool
    Age: More than 10 years

    My dryer won't start. The thermal fuse checks out OK. The door switch checks out OK. So, believing it was the board (which I've had to resolder the relays several times over the years), I got a new control board and installed it today. Still won't start. The relays on the board click, but the dang thing will not start.

    Only other thought I have is to check to see if the motor has failed, but I'm not sure how to test that, and I'd rather not pull it that far apart if I don't have to.

    Appreciate any advice y'all can offer. I really can't afford a new dryer right now.
    Last edited by rickgburton; February 2nd, 2019 at 08:25 PM. Reason: corrected model number

  2. #2
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    Recheck the thermal fuse. If the thermal fuse checks good use this diagram to make the following voltage measurements on the board:
    Click image for larger version. 

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    P9-2 - P8-3 = 120 VAC constant

    P9-2 - P8-4 = 120 VAC with door closed

    P9-1 - P8-3 = 120 VAC when start button is pressed
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  3. #3
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    Checked the thermal fuse again and it's now dead. I installed a jumper (switch) for testing voltages. All three check out as you specified, but it still won't start.

  4. #4
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    OK then it sounds like the belt switch is bad (or the motor). Check the broken belt switch for continuity:
    279782 Broken Belt Switch Kit
    Click image for larger version. 

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  5. #5
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    Turns out it was repairman error. I tore it down to check the belt switch (cleaned and checked the switch while I was in there) and realized I had been checking the thermostat, not the thermal fuse.
    Thermal fuse is dead. I jumped the connection. It works. Fuse should arrive in a few days to finish the repair.
    Thanks for your help!

  6. #6
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    That'll do it....keep us posted
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