The F2E3 error code on a KitchenAid Superba oven (model KERC607HBS6) indicates a problem with the oven’s temperature sensor or its wiring. This error typically arises when the sensor is faulty or if there is a short circuit in the wiring. To resolve the issue, you may need to check the temperature sensor for proper function or inspect the wiring connections for any damage. If troubleshooting doesn’t fix the issue, contacting a professional technician may be necessary.