{"product_id":"oem-goodman-0-50-wc-no-pressure-switch-for-gmv951155dxba-11177114","title":"OEM Goodman -0.50\" WC NO Pressure Switch for GMV951155DXBA — 11177114","description":"\u003cp\u003eThe \u003cstrong\u003eGoodman 11177114 Pressure Switch\u003c\/strong\u003e is a genuine OEM \u003cstrong\u003e-0.50\" water column, normally-open\u003c\/strong\u003e draft-proving switch for the \u003cstrong\u003eGoodman GMV951155DXBA\u003c\/strong\u003e 96% AFUE variable-speed gas furnace and compatible GMV\/GCV models. This safety control verifies that the induced-draft blower is pulling adequate venting airflow before the furnace is allowed to ignite — a required combustion-safety interlock.\u003c\/p\u003e\u003cp\u003eWhen the inducer starts and pulls the correct negative pressure, the switch closes and permits ignition. If venting is blocked, the inducer is weak, or a hose is cracked, the switch stays open and the furnace safely refuses to fire. A faulty switch is a leading cause of furnaces that hum but never light.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e 11177114 (OEM Goodman)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Air-proving \/ draft pressure switch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSet point:\u003c\/strong\u003e -0.50\" WC (water column)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eContacts:\u003c\/strong\u003e Normally open (closes on proven draft)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits:\u003c\/strong\u003e Goodman GMV951155DXBA and compatible condensing furnaces\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eOEM vs. Generic:\u003c\/strong\u003e The genuine 11177114 is calibrated to the exact -0.50\" WC trip point Goodman engineered for this furnace's venting design. A generic switch with the wrong set point can allow ignition under unsafe draft conditions or cause chronic no-heat lockouts. For a combustion-safety device, OEM calibration matters.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eInstallation difficulty:\u003c\/strong\u003e Easy to moderate — typically two screws and one or two hose\/wire connections, about 15–20 minutes. Confirm the hose ports are clear and the tubing is crack-free during replacement. Shut off gas and power before servicing; if the new switch still won't close, have a technician check for a venting restriction.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63058179391859,"sku":"GOODMAN-12883","price":89.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-0-50-wc-no-pressure-switch-for-gmv951155dxba-11177114","provider":"National HVAC Parts","version":"1.0","type":"link"}