The F3 indicates that the electronic oven control board senses an "open" or "short" oven temperature sensor probe circuit. This can be caused by a failed oven temperature sensor, a wiring failure or a defective electronic control board. I recommend
unplugging the range
and checking the resistance through the sensor circuit. The temperature probe is connected to the electronic oven control board through the violet wires on pins 12 and 13 of the P5 plug as shown in the first image below. Unplug this connector (with the range unplugged) and measure the resistance through the violet wires with a volt/ohm meter. The normal resistance of this circuit is shown in the second image below. The circuit should measure about 1100 ohms at room temperature. It will likely measure near zero ohms (short) or infinite resistance (open). If it measures the normal resistance, the electronic board will need to be replaced. If the circuit measures open or short, the resistance will need to be checked directly at the temperature sensor probe. If the probe is bad, it will need to be replaced. If the probe is okay, then the wiring harness will need to be replaced.
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If you are not completely confident in your technical ability to safely access and check these components, I recommend calling a service technician to repair the range.