The Nordyne 632515R dual-pressure switch is a genuine OEM component designed for two-stage gas furnaces that require both vacuum and positive pressure verification. It features dual sensing, closing at approximately –0.73″ W.C. (vacuum) and 0.43″ W.C. (positive pressure) to ensure proper inducer operation and combustion venting. With its reliable construction and quick-connect spade t... https://www.partshnc.com/632515r-nordyne-dual-pressure-switch