OEM Lennox Armstrong Ducane Furnace Air Pressure Switch 1.95″ Fits 38M64 38M6401
38M64 38M6401. It replaces the part numbers listed below. An air switch is safety designed to ensure that your inducer motor is running at the proper RPM, and creating the proper vacuum for your furnace to flue safely.
ClimaTek Air Pressure Switch 1.95″ Fits Lennox Armstrong Ducane 38M64 38M6401
38M64 38M6401. This is a new ClimaTek Air Pressure Switch 1.95″ It replaces the part numbers listed below. An air switch is safety designed to ensure that your inducer motor is running at the proper RPM, and creating the proper vacuum for your furnace to flue safely.