Otherwise there is a very good article about this by the sfgate how to clear the oven lock mechanism on a kenmore stove.
Kenmore gas range door lock stuck.
Modern kenmore ovens have a motorized lock that doesn t shut off automatically.
If it has been locked to prevent chlidren using it you push the oven light button to unlock it.
It needs to be in the proper position to lock the oven door.
It should also be replaced whenever the child lock out isn t working.
The f90 code means the electronic oven control board detects a problem with the door lock system.
If no food or utensils are in the oven start a self clean cycle then hit clear off after 60 seconds.
Wait about 15 seconds for the door to finish unlocking.
Watch this troubleshooting video to learn how to examine the components in the door lock system including the control board wiring and oven door lock motor assembly and find out which part has failed.
It will change once the door finishes unlocking.
If your oven has a solenoid controlling the door lock you will know by the locking lever.
1 oven door may be controlled by a solenoid system.
Video showing you the parts that make up the door lock system on your stove range.
You may hear a buzz noise when you lock or unlock the oven door using the locking handle.
If your oven door is locked open press and hold down the light switch while you continue to work through the process of cancelling the lock on the door.
If you have a stove that won t lock or won t allow you use the self clea.
Once you see the time of day displayed on the screen you can open the oven door.
If that does not unlock the door run a short self clean cycle 1 2.
Program your frigidaire oven to self clean.
When there is an issue with your range s door the door lock assembly is the first place you should check.
Set the oven to self clean.
2 oven door may be a heat sensitive locking.
Instead of trying to open it check the display panel again.
If you own a kenmore gas or electric freestanding oven you might have trouble unlocking your appliance after a cleaning cycle or find you can t close the door because the lock s engaged.
If there is food in the oven let the oven cool to room temperature and try to unlatch the door.
If the the door won t lock during the self clean cycle or won t unlock after self cleaning the assembly is most likely broken.
Replace the door lock assembly.
Wait at least 20 seconds before you cancel the self clean setting on the oven.