Watched the video here, took the leap that burner was the problem and ordered it. Also found another vid on you tube that was more specific to my Kenmore. Tip: find out how to take off the oven door. For mine it was very easy but not detailed in the APP vid.
I followed instructions in APP vid but also first took off back panel of range and tested resistance of old burner to ensure that was truly the problem (as suggested by other YT vid). Also, dis/connecting the wires from the back is easier than from inside, I think. Everything went according to directions, and the oven heats properly now. Only downside is that by pulling out the range...it was so nasty underneath that I had to clean up underneath and behind it which hadn't been done in quite a few years.
All in all - easy and so much cheaper, and easier than calling a repairman to come to the house in the middle of the day. I did this on MY schedule.