{"product_id":"oem-goodman-30-75in-wc-pressure-switch-for-amv90453bxab-11177113","title":"OEM Goodman -.30\/-.75in WC Pressure Switch for AMV90453BXAB — 11177113","description":"\u003cp\u003eThe \u003cstrong\u003eGoodman 11177113 Combination Pressure Switch\u003c\/strong\u003e is a genuine OEM dual-stage air-proving switch for the Goodman\/Amana \u003cstrong\u003eAMV90453BXAB\u003c\/strong\u003e two-stage gas furnace. This gray combination switch integrates two independent set points — \u003cstrong\u003e-0.30 in. WC\u003c\/strong\u003e and \u003cstrong\u003e-0.75 in. WC\u003c\/strong\u003e — to confirm proper draft on both the low-fire and high-fire stages before the control board allows ignition. If adequate negative pressure (draft) is not proven, the switch keeps the gas valve closed, protecting against blocked flue, failed inducer, or venting problems.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eGenuine OEM Goodman\/Amana part number 11177113\u003c\/li\u003e\n\u003cli\u003eCombination dual switch: -0.30 in. WC and -0.75 in. WC set points\u003c\/li\u003e\n\u003cli\u003eTwo-stage furnace draft-proving safety control\u003c\/li\u003e\n\u003cli\u003eGray housing, factory-calibrated diaphragms\u003c\/li\u003e\n\u003cli\u003eDirect fit for AMV90453BXAB and compatible two-stage models\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eOEM vs. Generic:\u003c\/strong\u003e The OEM combination switch is factory-calibrated to Goodman's exact trip points for both stages, so low- and high-fire draft are proven correctly. Generic single-pressure substitutes often can't match the dual set points and can cause pressure-switch lockout faults or unsafe firing. OEM is the reliable choice for this safety-critical control.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eInstall difficulty: Moderate.\u003c\/strong\u003e Replacement involves disconnecting two low-voltage wire harnesses and two rubber hose ports, then remounting the switch — typically 20–30 minutes. Match each hose and connector to its original port, and verify operation with a manometer after install. Always cut power before service.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63057818386803,"sku":"GOODMAN-7711","price":79.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-30-75in-wc-pressure-switch-for-amv90453bxab-11177113","provider":"National HVAC Parts","version":"1.0","type":"link"}