Have a Whirlpool dishwasher model GU1200xtks. It is at least 8 years old. The dishwasher is malfunctioning. Sometimes the panel lights does not turn on but it sounds like the motor turns on automatically when the door closes. The dishwasher doesn't go thru any wash cycle it just makes a motor noise.I hit the cancel button and the motor noise stops. I hit the cancel button again and the motor nose starts again. I hit certain buttons again and the motor noise comes on again. However the panel will start acting normal sometimes. All the bottons light up normally and the dishwasher starts running normally. But this normal is only temporary and it malfunctions again. Could it be some kind of stuck button on the keypad causing the malfunction or is the control board failing? Or is it something else? 
Bad touchpad user interface, is sticking in cancel mode causing unit to drain continuously... Replace both user interface and main control board due to software corruption
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SOURCE: Kenmore Ultra Wash Dishwasher LIghts are blinking....
I just read this for the same problem: push sanitize, then heat and dry, sanitize, heat and dry, sanitize, heat and dry, cancel, then open and close the door. It worked. The dishwasher is running correctly even as I type this.
SOURCE: Kenmore Ultra Wash Dishwasher LIghts are blinking....
I suspect for either of these units that the timer control boards are bad.
SOURCE: Frigidaire PLD4460REC Dishwasher will not start
This is very likely due to a bad main electronic control board but the only way to know for sure is to do some electrical testing with a volt/ohm meter and the wiring diagram located within the appliance. If possible use the meter and the wiring diagram to check input/output voltages looking for discrepancies between the diagram and the actual meter readings.
Go here for Frigidaire Dishwasher Parts: http://www.repairclinic.com/Frigidaire-Dishwasher-Parts
www.RepairClinic.com
SOURCE: Heating element circut malfunction In Dishwasher. Wash not workin
Great job walking through the possible causes! Hey, it is time to check the heating element itself. First visually, looking for brakes and then feeling for "bubbles" on the round element rod. Also see if it moves excessivly when you wiggle.
If no problem obvious, after you disconnect the dishwasher from power, use a multimeter to check for resistance (Ohms) If none, look for broken (heavy guage) wires and replace what's broken - probably the element itself.
If the element checks out good, suspect the thermistor then the controller/PCB.
Good Luck! Please report back what you find, OK?
SOURCE: ''clean'' light flashing (whirlpool Dishwasher GU2300XTLS1 model)
I had the same problem recently and a repair person came to my home to fix the dishwasher. He said he had to reset the control panel. He did this simply by making sure the soap dispenser door inside the washer was closed, then making sure the main dishwasher door was closed and locked. Then he quickly pushed the Heated Dry button and the Hight Temp wash button alternately. He said each button needed to be pushed twice within five seconds. After he did this all the lights on the control panel came on, then turned themselves off before the washer went in to a test cycle. This simple reset fixed the whole problem. Works great so far.
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