I have a Frigidaire Stainless Steel Range (Model PLES389ECG). The ESEC Lockout Feature is ON and I cant seem to get it unlocked (it shows a small red lock in the display). My model has a button that says Clear/Off and below the same lock that shows on my display. When I press that button for 3-5 secs as many of tips found elsewhere, that only seems to lock/unlock the oven door. I tried putting the stove in clean mode for a while and the waiting. That did not work either.

SOURCE: Whilrpool Self Cleaning Range Door won't unlock

try this 1. Verify error code by pressing and holding CANCEL/OFF key for 5 seconds.
Momentarily (less than 5 sec.) press CANCEL key again to remove error code
display.
2. Press and hold any key for 1 minute until F2 E0 code is displayed.
3. Cancel F2 E0 error code.
4. Program and start the clean mode. Observe to see if door locks. If it does not,
inspect the locking mechanism from the solenoid to the latch pawl and door to
find the cause of the problem. If the door is not locking, then 1 minute from the
start of clean, the F5 E1 code will again be displayed. Steps 1 through 3 will
have to be repeated before another clean can be started.
5. Once any mechanical problems with the latch mechanism have been corrected,
program and start a clean cycle (after, if necessary, clearing F5 E1 error code)
to ensure proper operation of the door lock. Immediately cancel the clean mode to observe proper operation of door unlock

SOURCE: frigidaire oven door locked

SOME RANGES ARE DESIGNED TO LOCK IF THE CONTROL SENSES A TEMPERATURE EXTREME. IF THERE IS A FAILURE OF THE SENSOR THAT MAKES THE CONTROL THINK THE TEMP IS UP, IT WILL LOCK THE DOOR TO PREVENT INJURY. REMOVE THE BACK PANEL AND FIND THE OVEN SENSOR LEADS COMING OUT THE BACK OF THE OVEN. DISCONNECT THE SENSOR AND CHECK THE RESISTANCE. AT ROOM TEMP IT SHOULD BE SOMEWHERE AROUND 1084 OHMS. IF IT IS NOT CLOSE,
THE SENSOR IS BAD. PLUG IN A NEW SENSOR AT THAT CONNECTOR AND THE DOOR SHOULD UNLOCK. THEN GET INSIDE THE OVEN, REMOVE THE OLD SENSOR, AND REPLACE IT WITH THE ONE PLUGGED IN.

SOURCE: oven door locked

unplug the oven for a few hrs, need a brand and/or model number to look up diag. codes

SOURCE: Oven door won't unlock

I had the same problem on my Kenmore Electric Range. Door would not unlock. Tried pressing "Off" for multiple seconds, but still would not unlock. No error codes. Clock was displaying normally. Finally decided to try running it thru the self cleaning operation to get it to cycle thru locking and unlocking the door. When I started self clean, the door automatically went thru the auto lock and "locked" appeared in the display. I then hit "Off" to clear it and stop the cleaning cycle. The door then unlocked as normal!

SOURCE: The ESEC lockout feature is

you can unplug the stove and plug it back in that will take the looking position. and in other models, set the oven to clean the oven for 5 minotes, and it will go of and will relace the oven door.