{"product_id":"oem-goodman-view-port-bushing-for-wfd18090s4bxcb-b1392139","title":"OEM Goodman View Port Bushing for WFD18090S4BXCB — B1392139","description":"\u003cp\u003eThe \u003cstrong\u003eGoodman B1392139 View Port Bushing\u003c\/strong\u003e is a genuine OEM replacement grommet that seats the sight-glass window on the burner compartment of your \u003cstrong\u003eWFD18090S4BXCB\u003c\/strong\u003e furnace. This small but critical rubber bushing seals the inspection port so you can safely watch flame ignition and burner operation without combustion gases or heat escaping into the cabinet. A cracked, missing, or brittle bushing lets the view port rattle loose and can trip flame-rollout or pressure faults.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003ePart type: View port \/ sight-glass bushing\u003c\/li\u003e\n\u003cli\u003eOEM part number: B1392139\u003c\/li\u003e\n\u003cli\u003eBrand: Goodman\u003c\/li\u003e\n\u003cli\u003eEquipment: Gas furnace burner compartment\u003c\/li\u003e\n\u003cli\u003eFits model: WFD18090S4BXCB\u003c\/li\u003e\n\u003cli\u003eMaterial: Heat-resistant molded grommet\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eChoosing the \u003cstrong\u003egenuine Goodman OEM B1392139\u003c\/strong\u003e guarantees the exact bore diameter and temperature rating specified for this cabinet. Generic universal grommets often run undersized or use lower-grade rubber that hardens and shrinks near the heat exchanger, breaking the seal within a season. OEM keeps your factory fit and safety certification intact.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eEasy (1\/5).\u003c\/strong\u003e Power down the furnace, pop the old bushing out of the port, and press the new one into place by hand — no tools or wiring required. Typical install time is under five minutes. If your furnace is repeatedly losing the view port, inspect the surrounding sheet metal for warping.\u003c\/p\u003e\u003cp\u003eAlways confirm your model and part number before ordering. Contact info@nationalhvacparts.com with questions about compatibility.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63058216681843,"sku":"GOODMAN-13870","price":8.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-view-port-bushing-for-wfd18090s4bxcb-b1392139","provider":"National HVAC Parts","version":"1.0","type":"link"}