Hi Debbie! Thanks for reaching out! We always want to know when one of our owners needs help, and we may have some solutions for this exact issue. A suggestion that may alleviate your issue with the knob getting stuck would be to remove it and then reinsert it. To remove control knobs: turn to the OFF position, grasp firmly, and pull off the shaft. To replace knobs, line up the OFF markings and push the knobs into place. I have attached a link to the Use & Care Guide for you to view, please refer to page 19 to view the oven temp knob display. https://images.homedepot-static.com/catalog/pdfImages/8c/8c4642ac-6311-4c3d-94e5-677edf7d5db2.pdf
If additional assistance is needed, we're here to help! Feel free to chat with us online at Frigidaire.com or contact us via phone at 800-374-4432 Monday-Friday, 8:30 am- 8:00 pm. ~Corletta