Dezeray S. provided a link for a previous answer in the above response. That answer provides some good troubleshooting for this problem.
You can try to reset the control board by unplugging the range to completely disconnect electrical power for 5 minutes. Plug the range back in and see if the F1 error code reappears. If the code does not appear, then you can likely use the range normally.
If the F1 code does reappear, then you can unplug the range and check the resistance of the oven temperature sensor probe using a volt/ohm meter. The sensor probe on most Kenmore 790 ranges can be accessed by removing the back panel (with the range
). The image below shows the temperature sensor probe connection. The sensor probe will likely have violet wires going to it. Unplug the sensor and check the resistance through that component. It should measure around 1090 ohms at room temperature. If the sensor is okay, you can plug it back in and measure the resistance through the entire sensor circuit from the control board (violet wires). If the resistance through that sensor circuit is normal, then you will probably need to replace the control board to fix the F1 problem.
You can order parts from the
website. Use the full model number of your range to access the parts list and order the correct parts.
These tips should help you resolve this F1 problem in your range. If you need more assistance, reply with additional details.
If you do not feel confident repairing this problem yourself, then you can have it repaired at your home by a Sears technician. Here is a link for the website:
Sears Home Services