Diagnosed problem using internet, the range igniters slowed became less effective and finally stopped working. I was able to replace the spark module by following a video provided by a representative. After reassembling the range top, the igniters sparked but did not light. Note while the stove is apart perform all your maintenance and clean the burners. Using a sewing needle I was able to clear the small pin hole that fed gas to to the igniters. Saved the expense of a new stove.