Some Kenmore microwave touch key control panels have a control panel lock that prevents children or others from using the microwave or altering pre-programmed settings. Additionally, the lock can prevent you from accidentally changing the settings when you're cleaning the panel. Typically, unlocking the microwave requires that you push a command key on the panel -- a key that controls general commands or a key specifically designed to control the locking function.
Touch and hold the "Enter/Start," "Start," "Lock" or "Control Lock" key, or key that has a padlock image, on your Kenmore microwave's control panel for about five seconds.
Check that the word "Locked" has disappeared from the display.
Run the kitchen timer or a cook cycle for 10 seconds to prove that you unlocked the control panel.