The Goodman 20197310 SPST Pressure Switch, rated at 0.60 inch pf, is a safety control device used in Goodman furnaces and HVAC systems. It monitors air pressure within the system to ensure proper draft and venting before burner ignition. When pressure conditions are correct, the switch closes to allow safe furnace operation. https://www.partshnc.com/amana-goodman-20197310-spst-pressure-switch