The Lochinvar & A.O. Smith 100112844 Ignition Module is an electronic control component designed to manage the burner ignition sequence in compatible gas-fired heating equipment. It coordinates the operation of the igniter and gas valve, helping ensure proper burner startup and flame monitoring. Used in compatible Lochinvar and A.O. Smith commercial boilers, water heaters, and pool he... https://www.partshnc.com/100112844-lochinvar-ao-smith-ignition-module