Hello. I have the same issue. I called the appliance company and they will do research . My cooktop got progressively worse and now takes 30 mins plus to turn on
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.
You most likely have a failed oven sensor or the control / clock has failed. Self clean mode lets the oven get extremely hot and sometimes causes electronics to fail.