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The Goodman 20197308 is a genuine OEM air pressure switch engineered for the GMH950703BXAE 96% AFUE two-stage gas furnace and compatible Goodman/Amana models. This normally open (NO) switch monitors combustion draft and proves proper venting airflow before the ignition sequence begins, protecting the heat exchanger from unsafe operation.
This is the factory OEM switch, calibrated to the exact -0.10 in WC set point Goodman specifies for the GMH950 platform. Generic aftermarket switches may have looser tolerances or incorrect set points, which can cause nuisance lockouts or unsafe draft proving. For reliable, code-correct operation we recommend the OEM part.
Easy (2/5). Two spade wires and one tubing connection; typically a 10–15 minute swap. Always cut power at the disconnect and confirm the correct trip point before returning the furnace to service.