Question about Whirlpool 24 in. GU940SCG Built-in Dishwasher

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Dishwasher is dead, no start

Whirlpool gu940scgb2. I have power. No lights on front panel. Door switch good. continuity from L1 thru door switch and TCO to terminal p8, k3 open, continuity from p9 top2-5 and from p7 to l2 thru door switch neutral side. Is the control board toast or is there something I can check on it, no obvious burns, cracks or brakes on control board. Is there an other fuse on-board, the one I called TCO is clipped onto the case holding the board and isnot mounted to the circuit board.

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  • mystreetglid Jan 29, 2009

    That is the TCO, correct. I have coninuity to the board at P8.

  • mystreetglid Jan 29, 2009

    I have the schematic for this unit and have checked all the switches and wires. I have 115 volts to the circuit board at terminal P8, power passes through the TCO to get to the board.

  • mystreetglid Jan 29, 2009

    I think I know more about troubleshooting than you, look at the schematic and reread the post. NEXT

  • mystreetglid Jan 29, 2009

    L1 goes thru the door switch then the tco (fuse) to the board. Power is to the board at terminal P8. And I have continuity from P7 on the board back to L2 thru the door switch. I must have a bad board cuz everything checks out but the board wont respond. Is there any board level checks that can be made, yes I have a fluke vom and am proficiant with it, ive been troublshooting controls for 20 years, im looking for suggestions at the board level. Thanks for your help, sometimes I get short, lack of coffee i suppose :)



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There is a fuse just before power enters the control panelwhere the line goes in check that first bet its open

Posted on Jan 29, 2009

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  • robert samples Jan 29, 2009

    the fuse dont look like a fuse check the other side of p8 do live power test as my instructor at whitlpool says find where the power starts find where it stops in between is the promblem so hook to neutral and follow the power but be careful

  • robert samples Jan 29, 2009

    just trying to help bud if the fuze is good then its possable you got a bad control bd but the tco stands for a thermal cut out this is a fuze that clips to the side of the control panel if i reamber it has a blck wire on it after the door switches

  • robert samples Jan 29, 2009

    there are no checks for the board but some times you can take the ribbion loose from the touch pad and clean it gently with a pencial eraser mico voltage here so tiny resistance will cause promblems also check your warrenty under 2-5 year i think the control bd is under extended warrenty and check the connections at the powerbox if there is a weak connection there will still get voltage but will drop under load

  • robert samples Jan 29, 2009

    send me an e mail at b4829 ref dishwasher ill explain



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