The Fenwal 35-615516-111 Direct Spark Ignition Control is an electronic module designed to provide safe, automatic ignition in gas-fired HVAC heating equipment. It generates a high-voltage spark to ignite the gas-air mixture and monitors flame presence to ensure proper burner operation. Commonly used in gas furnaces, boilers, and unit heaters, this control coordinates ignition and saf... https://www.partshnc.com/35-615516-111-fenwal-24v-dsi-3tryremote-4tfi-15pp