{"product_id":"oem-goodman-37in-no-pressure-switch-for-gms950704cxa-furnace-20197312","title":"OEM Goodman -.37in NO Pressure Switch for GMS950704CXA Furnace — 20197312","description":"\u003cp\u003eThe Goodman \u003cstrong\u003e20197312 Air Pressure Switch\u003c\/strong\u003e is a genuine OEM \u003cstrong\u003e-0.37 in. WC, normally open (NO)\u003c\/strong\u003e draft-proving control for the Goodman \u003cstrong\u003eGMS950704CXA\u003c\/strong\u003e 96% AFUE condensing gas furnace and compatible GMS95-series models. Connected to the induced-draft blower, this switch confirms that the vent system is drawing correctly before the control board allows ignition. If the required negative pressure isn't reached — from a blocked flue, condensate backup, or weak inducer — the switch keeps its contacts open and safely prevents burner light-off.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eType: Diaphragm air pressure (draft) switch\u003c\/li\u003e\n\u003cli\u003eSet point: -0.37 in. water column\u003c\/li\u003e\n\u003cli\u003eContact configuration: Normally Open (NO)\u003c\/li\u003e\n\u003cli\u003eFunction: Proves induced-draft airflow before ignition\u003c\/li\u003e\n\u003cli\u003eFits: Goodman GMS950704CXA and GMS95-series furnaces\u003c\/li\u003e\n\u003cli\u003eReplaces: Goodman OEM #20197312\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003ePressure-switch set point and contact type are calibrated to this furnace's inducer and vent design. This OEM switch trips at exactly -0.37 in. WC with the correct NO contacts, so venting is proven precisely as certified. A generic switch with the wrong set point or NC contacts can allow unsafe operation or cause chronic pressure-switch lockouts. Match the rating exactly.\u003c\/p\u003e\u003ch3\u003eInstall Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eModerate (2 of 3).\u003c\/strong\u003e Power off, note and transfer the pressure hose(s) and spade terminals to the new switch, and remount. Inspect the hose and inducer port for condensate or blockage while you're in there. A 20–30 minute repair.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63058153374067,"sku":"GOODMAN-20197312","price":32.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-37in-no-pressure-switch-for-gms950704cxa-furnace-20197312","provider":"National HVAC Parts","version":"1.0","type":"link"}