i have a Kenmore stove for 3 years, and i went to turn on the left burner yesterday and found out after a couple of minutes that it was not heating up, now the right dual burner is heating up just fine and so are the back two. i dont know why it is no working, but when i took the knob off their was a red dont on this switch. and if you look at the light above the know( the one that lights up when the element is hot and on,) if you have the switch btwn off and low, but not on low you can see a faint light on it.