The Nordyne 632491R SPST Pressure Switch -1.50"WC is a reliable replacement component designed for use in Nordyne and compatible HVAC systems. It monitors air pressure within the furnace to ensure safe and efficient operation. Featuring a single-pole, single-throw (SPST) configuration and a set point of -1.50 inches water column, this pressure switch helps protect your system from imp... https://www.partshnc.com/632491r-nordyne-150-wc-spst-pressure-switch