Suburban Furnace Motor 232684 (SF Series). NBK-20565 232684 – MOTOR DC 12V W/GASKET 50W, 2730 RPM. Suburban 232684 SF 35/42 Series Furnace Repl. Compatibility :Suburban Furnace SF-35/ SF-35F (Above Serial Number 012003642)/ SF-42/ SF-42F.