{"product_id":"oem-goodman-10-no-pressure-switch-for-gmh951155dxag-20197308","title":"OEM Goodman -.10\" NO Pressure Switch for GMH951155DXAG — 20197308","description":"\u003cp\u003eThe \u003cstrong\u003eGoodman 20197308 Pressure Switch\u003c\/strong\u003e is a genuine OEM draft-proving safety control for the \u003cstrong\u003eGMH951155DXAG\u003c\/strong\u003e gas furnace, rated at \u003cstrong\u003e-0.10 in. w.c.\u003c\/strong\u003e with normally-open (NO) contacts. Connected to the induced-draft blower, this switch confirms proper venting airflow before the ignition sequence begins — closing its contacts only when the correct negative pressure is sensed. If draft is blocked or the inducer fails, the switch stays open and locks out the furnace, preventing dangerous combustion. A weak diaphragm or off-spec switch is a leading cause of no-ignition and lockout codes.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 20197308\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Pressure Switch — Draft Proving\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSet Point:\u003c\/strong\u003e -0.10 in. w.c. (water column)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eContact Type:\u003c\/strong\u003e Normally Open (NO), closes on draft\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEquipment:\u003c\/strong\u003e Gas Furnace\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary Fit:\u003c\/strong\u003e Goodman GMH951155DXAG\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Goodman (OEM)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eOEM (20197308):\u003c\/strong\u003e Factory-calibrated to the exact -0.10\" set point and tube-port layout this furnace needs — critical, since an incorrect set point defeats the safety function. Strongly recommended.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eGeneric:\u003c\/strong\u003e Aftermarket switches must match the exact pressure rating, contact configuration, and hose fitting. Never substitute a different set point on a safety control.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eEasy (2\/5).\u003c\/strong\u003e Power down the furnace, note the wiring, disconnect the two spade terminals and the rubber sensing hose, unscrew the bracket, and install the new switch. About 15–20 minutes. Confirm the -0.10\" rating printed on the switch matches the original.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63058125652339,"sku":"GOODMAN-11549","price":32.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-10-no-pressure-switch-for-gmh951155dxag-20197308","provider":"National HVAC Parts","version":"1.0","type":"link"}