I have a code when my oven preheats it's Amana the oven will be on about 30 min and the code F3E2 comes on and it starts beeping

SOURCE: amana oven

Error F-9 means:Door lock safety circuit on ERC sensed Replace the door latch assembly

To solve this...Just press and hold the door latch to unlock position and then press cancel for a few seconds. The latch will return to its original position

This will probably fix it..but if doesnt work try this
Try unplugging the oven from the electrical power. May release the lock, which is held in place by a tiny micro switch. If not and while the electric is still off or the oven is unplugged, use a bright light flashlight to look through the slot where the lock is in the oven, not in the door.

You may be able to use a thin blade screwdriver to move the lock to the release position. Check the angle of the lever. A slightly bent lever handle also can cause this type of condition.

If all else fails, remove the access panel on the front of the oven to access the locking device and release it. May have to disconnect the wires to the lock which will allow door to function but not during any self cleaning modes.

SOURCE: Kenmore Electric Oven Model 4088816 - Error Code F3

f-3 means the oven temp sensor is bad. replace the sensor and problem solved

SOURCE: F4 error code on Jenn-Air W30400BC expressions built in oven

Slone, F4 is the code for a shorted temperature sensor. This is the temp probe in the oven. There are 2-quarter inch screws holding it on. It should pull out through the insulation until the quick connect comes through. If you want to make sure, the sensor should ohm out at 1143 ohms at 100 degrees. I think you can be pretty sure that this is the problem. The part number I have is 704657. Catriver.

SOURCE: F2 and F3 code appearing along with annoying beeping

i think f3 error code has something to do with the temp probe maybe it is the problem. the temp probe is located if you open the door directly in the back wall. it looks like a prong. should read 1100ohms the f2 error code though usually has something to do with the keypad i would check all the connections maybe they are loose.

SOURCE: Jenn-Air Wall Oven Model #WW30430P F5 Fault Code

I have the exact same problem with an F5 fault code. I also have a new clock assembly. RepairClinic.com said "Jenn Air fault code F5 = Hardware and watchdog circuits disagree / Replace clock assembly (also called the ERC)

Jenn Air Fault code for newer models F5 = Power to element relays disabled in cook mode
1. Intermittent oven temperature sensor or wire harness or,
2. Intermittent contact on power relay board"
This doesn't help since it is too technical. What should I do next?