Suburban Furnace Control Board Wiring Harness 520832 (SF Series) Compatibility: Suburban Furnace SF-20/ SF-25/ SF-30/ SF-35/ SF-42/ SF-20F/ SF-25F/ SF-30F/ SF-35F/ SF-42F   This wiring harness is to connect to module board 521099 to create the additional fan control feature Features Limite... See More