Oven seems to turn off while cooking

The oven has internal fan at back of oven encircling the element that should get reshot when stat turned up high. Also there is cooling fan under lid to keep the wiring area cool.This should stay on for around ten - fifteen minutes after cooking finished. David "The Famous Forry"

I would contact the manufacturer .there could be a recall on it if you make them aware of the problem .

It is possible the oven sensor is going bad.

It is used to cool down the heat.....just to protect the board and surrounding hardware components from over heating which in turns increases the life span of the hardware

temperature ntc failing will need replacement.

Typically an oven beeps when the interior temperature macthes the temperature where you set the dial. This is an audible signal to that fact and particularly helpful when you need to pre-heat the oven. For example it you want to cook something at 350 degrees, you set the dial at 350. When your oven reaches that temperature it beeps to let you know. Some cooking directions tell you to preheat your oven. In that case, when you set the dial to 350 and wait for the beep...you know you are safe to start your cooking process because the oven is now pre-heated to the temperature you set. If your recipe requires a pre-heated oven, and you don't wait for the beep, your taking a guess at what temperature you're cooking your food. Additionally, if you want to know what the internal temperature of oven is and your oven is heated...you simply turn you dial setting and listen for the beep. Again, if you set your oven at 350 and you want to know how hot your oven is... slowly turn the dial setting. If the oven beeps at 275 then that's how hot your oven has gotten. To let it finish heating to 350 just reset the dial and wait for the beep.

1.Press the "Clear/Off" button on the control panel to reset the oven. This will clear the lock setting and unlock the door.

2.Allow the oven to cool to room temperature to avoid turning the lock on again during this heating cycle.

3.Reset the oven to the temperature you require to finish cooking by pressing the correct temperature control on the control pad.

or

1.If your GE Profile microwave won't turn on, unplug it, then plug it back in. A power outage may have occurred due to a power surge. Check your home's fuses and circuit breakers.

2.Set the clock of your GE Profile microwave. Certain models will not operate until you set the clock. Select the "Clock" key and type in the correct time.

3.Hold down your microwave's "Off" button. You may have accidentally hit the control-lock feature on your GE Profile microwave. Hold down the "Off" button for three seconds to turn the lock off.

4.If the sensors of your GE Profile microwave are not working correctly, remove the food from the machine. If the sensors detect food-surface temperatures over 200 degrees Fahrenheit, it will not work properly until the area cools down.

5.Contact GE Support if you are unable to resolve the issue on your own. Call the GE Support hotline or browse the help library on the GE website. You can also schedule a service visit on GE's website.

The oven cooldown fan will sometimes run for 10 to 15 minutes after turning the oven off. This enables the outer shell of the oven to cool down. Most ovens also have an inbuilt thermal overload in the outer shell. If the temperature in the outer shell gets too hot it will open circuit the oven power until it cools down a bit.

The thermostat is the cause of the problem, normally the the only cure is to replace the oven thermostat,completely, or alternatively, compensate by setting a lower temperature when cooking.
this will work o/k if it is always the same variation in temperature across the range .

Don't open or try to open the oven door, until it has cooled down completely. The oven heats to a very hot temperature, usually 800 to 900 degrees. The door locks itself once it gets to a certain temperature, and will not allow the door to be opened until it cools below a certain temperature. On some units, this can take hours to cool down enough to unlock. If you try to force it before the cooldown is complete, it usually results in a repair call. If it still will not unlock when it is cool, turn your power to the oven off for 20 minutes, then turn on and reset your oven controls. Sometimes you have to put the oven back into the self-cleaning cycle, and then cancel it immediately to cycle the oven door lock. If it still won't unlock, call a repair company out to service this. Good Luck, Appliance Specialists