My Kitchen gas stove top is 11 years old. About three years ago the electric ignitor started working sporadically. Recently it stopped working at all, except once or twice when a burnner was lit with a match and had been burning for a while. However after the burners had been turned off for a while the ignitor no longer worked. Does it sound as if the spark module needs to be replaced? Since it's a $130 part I would like to be reasonable sure it is the problem before ordering it.