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GDF640HGM0WW Dishwasher display intermittent then not working

CrazyCarl

By CrazyCarl
in DIY Appliance Repair Help

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CrazyCarl

CrazyCarl

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Been trying to figure out this dishwasher. Display was dead, checked for dc voltage to the ui board and it had either 5 or 12v. So I ordered new UI and that didn’t fix it. Tried new main board and ui together and didn’t fix it. Tried unplugging all the dc components I could find to make sure it wasn’t loading down and still doesn’t work. At this point I’m down to the wiring running from the control to the ui (which I checked the continuity of the wires and they’re supposedly good). Wiring diagram only gives so much information, would love some help troubleshooting this further. I’ve been in the biz for 2 1/2 years so I am comfortable getting voltage readings and general troubleshooting

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CJ Pool Kohai

CJ Pool

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Having replaced the main board and the UI i would be suspecting an intermittent open between the UI and Main board. Try flexing the wires before you check continuity

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