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Bryan, Home Appliance Technician
Category: Appliance
Satisfied Customers: 12156
Experience:  15 yrs. experience as a certified appliance technician.
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My Whirlpool dishwasher (GU1200XTLT3) will not operate. There

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My Whirlpool dishwasher (GU1200XTLT3) will not operate. There are blinking lights on the control panel. If I press a button more lights blink and nothing happens. Occasionally the lights will stop blinking and the unit will operate. I have turned off power to the unit momentarily but this does not help. I'm not sure if I need a new control panel or if something else is wrong. Why are the lights blinking and the unit frozen?

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do the lights blink 7 times then repeat?

Customer: replied 5 years ago.
No they constantly blink
This means the main control board has failed in needs to be replaced, here is a link where you can order the part and there is also a video there to show you how to replace it, .
Bryan and 2 other Appliance Specialists are ready to help you