Dishwasher "lock on ' control wont turn off

Well, if you can't change the cycle by pressing another cycle button, yet you CAN press Start or Cancel and it responds, then you probably have a bad control console. If nothing responds, then you may just have the control-lock (or child-lock) feature turned on.

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Sounds like you have a bad control console.

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Well, I could be wrong, but is sounds like a bad control module or control console (keypad).

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Look carefully at your dishwasher keyboard, to see what key is nearest (above or below) the lighted lock symbol. Usually it's the Heated Dry button. Whatever it is, press and hold that key for 5 seconds. That should unlock you dishwasher and you can now use it normally.

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Wish I could solve this, as I'm having the same problem too. Normal light blinks not matter which wash button is pressed. Cancel light will light, but still NOTHING happens. Same model as yours.

Hold the control lock in for more than four seconds. See if that works.
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that would be model # 66516012403 correct??
you may have inadvertently set the lock on function..
check this out from your manual...

Lock On
Use the Lock On to prevent unintended use of the dishwasher
between cycles. You can also use the lock feature to prevent
unintended cycle or option changes during a cycle.
When LOCK ON is lit, all buttons are disabled.
NOTE: The dishwasher door can be opened while the controls
are locked. However, the lock must be turned off and the Start/
Resume button pressed to resume the cycle.
To turn on the Lock
Press and hold HEATED DRY for 4 seconds. LOCK ON glows.
If you press any pad while your dishwasher is locked, the light
flashes 3 times.
NOTE: If the Heated Dry option is selected, the light will
temporarily turn off until Lock On glows.
To turn off the Lock
Press and hold HEATED DRY for 4 seconds. The light turns off.

hope this helps,
best of luck,
ttfn

More than likely it is a shorted key. replace the touch panel.

Just press the 'Air Dry' button for 5-6 seconds....I have an ancient Kenmore Dishwasher (ULTRA)

According to my ultra wash dishwasher you have to hold the no heat dry button for 4 seconds and that is how you lock and unlock the control panel