Read about symptoms at APP from others stories. Seemed most likely cause was igniter. Order part received in two days. Install took about 30 minutes. Screws in oven floor pan and then on the flame deflector shield were dry from repeated heating. Once screws were out decided to take out burner to install new igniter. Just unplug the one wire on igniter and one screw on burner and lift out assembly. Two hex head screws hold igniter to burner. Easy install. Parts were a bit cheaper at APP then driving to local parts house directly. Very easy. APP provides a great service to help service basic issues on appliances. Thx.