{"product_id":"oem-goodman-10-in-wc-pressure-switch-for-gmh950904cxaf-20197308","title":"OEM Goodman -.10 in WC Pressure Switch for GMH950904CXAF — 20197308","description":"\u003cp\u003eThe \u003cstrong\u003eGoodman 20197308 Pressure Switch\u003c\/strong\u003e is a genuine OEM draft-proving safety switch rated at \u003cstrong\u003e-.10 inches of water column (in WC), normally open\u003c\/strong\u003e, built for the \u003cstrong\u003eGoodman GMH950904CXAF\u003c\/strong\u003e 95% AFUE two-stage furnace and compatible GMH95 models. It verifies that the induced-draft blower is generating proper negative pressure before the ignition sequence begins. If venting is blocked, the trap is clogged, or the inducer is weak, the switch stays open and the control board locks out ignition — preventing unsafe combustion.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eSet point: -.10 in WC (water column)\u003c\/li\u003e\n\u003cli\u003eContact type: Normally Open (NO)\u003c\/li\u003e\n\u003cli\u003eFunction: Draft \/ negative-pressure proving safety switch\u003c\/li\u003e\n\u003cli\u003eFit: Goodman GMH950904CXAF and compatible GMH95 furnaces\u003c\/li\u003e\n\u003cli\u003eOEM Part Number: 20197308\u003c\/li\u003e\n\u003cli\u003eBrand: Goodman \/ Amana OEM\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003ePressure switches are only correct when the \u003cstrong\u003eset point matches your furnace exactly\u003c\/strong\u003e. This factory-original switch is calibrated to -.10 in WC for the GMH950904CXAF's inducer and venting design. A generic switch with the wrong rating causes chronic short-cycling, nuisance lockouts, or — worse — allows operation under unsafe draft. Always match the OEM number and set point.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty: Easy (2\/5)\u003c\/h3\u003e\u003cp\u003eTurn off power, note the hose and wire positions, remove the mounting screw, and swap in the new switch. Reconnect the rubber pressure tube firmly and confirm no cracks or moisture inside it. Verify furnace operation through a full heat cycle afterward.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eGenuine Goodman OEM pressure switch — exact -.10 in WC calibration for the GMH950904CXAF.\u003c\/em\u003e\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63058119426419,"sku":"GOODMAN-11357","price":32.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-10-in-wc-pressure-switch-for-gmh950904cxaf-20197308","provider":"National HVAC Parts","version":"1.0","type":"link"}