Frigidaire Stove

My stove works well, but my oven stays all the time without being lit. I need to cut the power by turning off the breaker.

Hate work is correct. Most likely the contacts on the switch for the oven are welded so that it can not disconnect. By age of the device you can have a contact somewhere, if that is the case, it will be much easier to replace.
When you turn the oven control, do you hear a click? If so does the oven light on and off? but the oven still warm. If this is the case, you probably do. The best thing to do is cut the power, unplug the oven and remove the back plate. Find the son who will return to the oven and the place where they connect to the oven or over. You should be able to visually inspect and notice problems.
Good luck and be full of care.

You need a new command button, they are a little strawberry to question, you must run the thermostat in the oven. If you do not use just unplug the end of the tape back and son until you fix. TURN the first power