{"product_id":"oem-goodman-37-wc-no-pressure-switch-for-gmv90905cxba-20197312","title":"OEM Goodman -.37\" WC NO Pressure Switch for GMV90905CXBA — 20197312","description":"\u003ch2\u003eGoodman 20197312 Air Pressure Switch (-.37\" WC, Normally Open)\u003c\/h2\u003e\u003cp\u003eThe Goodman 20197312 is a genuine OEM negative air pressure switch calibrated to -0.37 inches of water column and configured normally open (NO). It is designed for the GMV90905CXBA two-stage, variable-speed 92% AFUE condensing gas furnace. This safety switch proves that the induced-draft blower is pulling adequate combustion airflow before the control board allows ignition. If venting is blocked, the condensate trap is clogged, or the inducer is weak, the switch stays open and safely prevents the burners from firing — protecting against incomplete combustion and CO risk.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eOEM Part Number: 20197312\u003c\/li\u003e\n\u003cli\u003eSet Point: -0.37 in. WC (water column)\u003c\/li\u003e\n\u003cli\u003eConfiguration: Normally Open (NO), single stage of a multi-switch assembly\u003c\/li\u003e\n\u003cli\u003eFits: Goodman GMV90905CXBA condensing furnaces\u003c\/li\u003e\n\u003cli\u003eFunction: Combustion air \/ draft proving safety switch\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003ePressure switches are calibration-critical. The OEM 20197312 is factory-set to the exact -0.37\" WC trip point the GMV90905CXBA control expects. Generic or mismatched-setpoint switches can cause chronic lockouts or, worse, allow firing under poor-draft conditions. Always match the setpoint and NO\/NC configuration exactly.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eModerate (3\/5)\u003c\/strong\u003e — Roughly 20–30 minutes. Cut power, photograph wiring, transfer the two spade terminals and the rubber pressure hose, and mount the new switch. Verify the hose port is clear and the tubing routes without traps. A manometer check is recommended after install.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63058172346739,"sku":"GOODMAN-12706","price":32.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-37-wc-no-pressure-switch-for-gmv90905cxba-20197312","provider":"National HVAC Parts","version":"1.0","type":"link"}