Hello, and thanks for your question! My name is Charles and I am happy to assist you today!!
F3 is the error code for a defective Oven Temp sensor. If the sensor is bad it will not know when to shut down the oven.
You can attempt to repair this yourself as it is pretty easy.
Open the oven door and look in the back of the oven. You should see a probe that sticks out of the back and has 1 or 2 screws that hold it in place. remove those screws and slide the probe out. There should be a connector that you can unplug and remove the sensor. Install the new sensor in the reverse manor.
This should remedy your issue according to your error code.
I hope this helps answer your question, if so please click the green accept button, if not im still here to assist you,
Ok, thanks for the update. The F3 error code according to the manufacturers own manuals is the error code for a bad oven temp sensor. I will make note of you information. Thanks again,