burner would not light; ignitor did not produce spark

Take a few screws off the back of the slide in burner module. Take off the back. Unscrew the ignitor screw, remove ignitor carefully, replace with the new ignitor, put the screw back in, put the back back on, try it out! Ours worked after a couple of tries - don't know if the ignitor had to "rev up" by several sparks or we just didn't have it properly installed at first. Anyway, very easy. Did it in my pajamas on a Saturday morning.