{"product_id":"oem-goodman-50-no-pressure-switch-for-amv90905dxba-11177114","title":"OEM Goodman -.50\" NO Pressure Switch for AMV90905DXBA — 11177114","description":"\u003cp\u003eThe \u003cstrong\u003eGoodman 11177114 Pressure Switch\u003c\/strong\u003e is a genuine OEM air-proving switch for the \u003cstrong\u003eAMV90905DXBA\u003c\/strong\u003e gas furnace and compatible Goodman\/Amana models. Rated at \u003cstrong\u003e-0.50\" WC (water column), normally open\u003c\/strong\u003e, this switch verifies that the induced-draft blower is establishing proper venting before allowing ignition. When correct negative pressure is sensed, the normally-open contacts close and the ignition sequence proceeds — protecting against blocked flues, cracked hoses, or a failing draft motor.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eOEM Part Number: 11177114\u003c\/li\u003e\n\u003cli\u003eCompatible Model: AMV90905DXBA (Goodman\/Amana furnace)\u003c\/li\u003e\n\u003cli\u003eSet Point: -0.50\" WC (water column)\u003c\/li\u003e\n\u003cli\u003eContact Configuration: Normally Open (NO)\u003c\/li\u003e\n\u003cli\u003eFunction: Draft \/ venting pressure proving safety\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003ePressure-switch set points are model-specific. The \u003cstrong\u003eOEM 11177114\u003c\/strong\u003e is calibrated to trip at exactly -0.50\" WC, matching the AMV90905DXBA's draft design. A generic switch with a different threshold can cause hard-start faults, nuisance lockouts, or unsafe operation. For this safety-critical control, install the genuine OEM switch.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eModerate (3 of 5).\u003c\/strong\u003e Disconnect power, note the hose and wire routing, remove the mounting screws, and transfer the pressure hose and electrical leads to the new switch in the same orientation. Confirm the hose is free of cracks or condensate blockage, then test a full ignition cycle.\u003c\/p\u003e\u003cp\u003eRestore safe, reliable draft proving with this genuine Goodman -.50\" normally-open pressure switch.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63057835196787,"sku":"GOODMAN-7794","price":76.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-50-no-pressure-switch-for-amv90905dxba-11177114","provider":"National HVAC Parts","version":"1.0","type":"link"}