Manufacturer Name: Lochinvar & A.O. Smith Product Number: 100351312 OEM Part Number: 100351312 The Lochinvar & A.O. Smith 100351312 Low Voltage Harness is a pre-wired electrical assembly that may be easily installed in compatible A.O. Smith gas furnaces. It works by attaching the igniter, blower motor, gas valve, and other electrical parts to the control board of the furnace. Thi... https://www.partshnc.com/100351312-lochinvar-ao-smith-low-voltage-harness