The control lock function on a Whirlpool dishwasher is a child safety feature. The control lock deactivates the control panel touchpad keys so the washer cannot be started, but still allows the door to be opened. The feature is not meant to replace adult supervision in the home; it is to be used in addition to responsible supervision of children in the house.
Press "Heated Dry." Hold the button for four seconds or until the "Control Lock" light comes on. The control panel is now locked.
Open the door, then load dishes to the dishwasher if needed. The door can be opened and the washer loaded while in a "Control Lock" state.
Press "Heated Dry." Hold the button for four seconds or until the "Control Lock" light goes out. The control panel is now unlocked and will operate normally.