Kenmore c880 6571990

Clear the lock mechanism -- as indicated by the DOOR LOC light -- by pressing and holding in the oven door light switch for 20 to 30 seconds. While the switch is depressed, the latch motor will gradually withdraw the lock, allowing you to open your oven door.

i know that it can be very difficult to have issues with your oven. the f93 on this model of kenmore range indicates that you have a problem with the oven door lock assembly (see image below). this can be caused by a failed oven door lock assembly, a wiring failure or a bad electronic oven control board.
i recommend that you unplug the range and check the wiring between the components first. you can remove the upper back panel of the range to access the electronic oven control board in the console. you may need to remove the lower panel to access the door lock assembly on the back of the range. the image below shows the wiring diagram and other information that should help you check the wiring connections. check for a mechanical binding of the door lock assembly as well. if the wiring connections are okay, you will likely need to replace the oven door lock assembly. if you need further assistance, please reply to this thread. thank you for using manage my life.

You could try to restart and stop clean cycle. Otherwise unplug stove and remove back panel to access locking mechanism.

Could be the lock needs replacing the oven won't self clean if the door lock isn't functioning it's a safety thing so you don't get your face burnt .
Ray

I was cleaning my range hood and leaning over I somehow set the lock on the cook top. How do I unlock it?

You can do this by:
Check the oven display to see whether the screen says "LOC." When "LOC" is displayed, the oven lock is activated and the door cannot be opened. You need to make sure it is locked so you do not mistakenly lock the door.

2 Press and hold the "Stop" button on the oven control panel until "LOC" disappears from the display. Some oven models have a button marked "Oven Lock," which should be used instead of the "Stop" button.

Lock the oven again by pressing and holding the "Stop" or "Oven Lock" button until "LOC" appears in the display

According to your service manual page 9 an F-90 is maximum oven door unlock time exceeded.
Here is your SERVICE MANUAL

This video shows how to check the door locking mechanism:
This shows how the electric oven high voltage portion of your oven works:

If you need further help, reach me via phone at https://www.6ya.com/expert/dan_73bbd84fe1d95b61

Either hold down the 'Unlock' button or if the little red pad lock symbol is lid in the main display hold the 'Oven light' button for about 7 seconds...

to get all the detailed instructions
just click this link directly
http://www.applianceaid.com/selfclean5.html
The oven door lock needs approximately 1 hour to cool down before the oven door can be opened after a self cleaning cycle has finished. If the lock does not open after the oven has cooled down, you can try....1) Unplugging the range or shut off the circuit breaker for 5 minutes. Plug the range back in or turn on the circuit breaker. Set the clock and try moving the door lock lever or opening the door. 2) Set the self-clean cycle again and only allow it to work for 15 minutes. Cancel the self-clean cycle and allow the oven to cool. Gently try moving the door lock lever or opening the door.

Most ranges today use 3 different types of door locks...one is a solenoid controlled lock ( you hear a loud buzz noise when setting or unlocking the lock and has a arm that you must move to set the lock )...another is a heat sensitive lock ( has a arm that you must move to lock and un-lock, makes no noises and has a spring that slowly moves to lock the door will the oven is heating up )...Some locks are motorized ( no handle to move, the motor locks the door by it's self when you set the range for self clean )... If the motorized and heat sensitive locks fails to open after the self clean cycle, you must access the lock and move it yourself to open the door. On the free standing ranges, most times you must lift the cook top to access the lock mechanism. On built in ovens, the oven must be pulled out to remove the top access panel to get at the lock mechanism. Some build in ovens can have the control console removed to access the lock system. On the heat sensitive style of lock, there are no electrical parts to operate the lock, usually you will need to replace the lock. On the motorized style of lock, you will have to use a ohm/volt meter to test why the motor will not work. On the solenoid style of lock, the solenoid is often mounted on the back of the range and can be accessed by removing the rear panel, some may be mounted at the front, such as in a built in oven. The failure of the solenoid style of lock is normally caused by a bad lock solenoid. In order to get your door open, you must operate the door latch mechanism manually. Unplug or remove power from the range. Take the rear cover off the range. Locate the door latch assembly and operate it manually and open your door. Then check continuity of the solenoid. Some of the latch assemblies have micro switches to supply power also. You may need to check them. You should be able to get the door open and use your range until you can get a tech to repair if you can not repair yourself.

If you've interrupted the clean cycle or have accidentally set the clean cycle with the oven door open, the latch may have engaged and now the door can't be closed because it will hit the latch. There may be a door activated* switch on the front face of the oven. In this case you may need to manually press that door switch with your finger while at the same time canceling the clean cycle to get the latch to retract so the door can close fully again.
thanks.

should be an unlock button.....press and hold the button until it unlocks