{"product_id":"oem-goodman-14-in-2-cell-heat-exchanger-for-gmnt040-3b-4821400s","title":"OEM Goodman 14 in 2-Cell Heat Exchanger for GMNT040-3B — 4821400S","description":"\u003ch2\u003eGoodman 4821400S 14\" 2-Cell Heat Exchanger\u003c\/h2\u003e\u003cp\u003eThe Goodman \u003cstrong\u003e4821400S\u003c\/strong\u003e is an OEM 14-inch, two-cell heat exchanger engineered as a direct replacement for the \u003cstrong\u003eGMNT040-3B\u003c\/strong\u003e gas furnace. The heat exchanger is the heart of the furnace's combustion system, transferring heat from the burners to the circulating air while keeping flue gases safely separated from your indoor air. A cracked or rusted exchanger is a safety hazard, and replacing it with a genuine OEM assembly restores rated efficiency and combustion integrity.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eType: Clamshell heat exchanger, 2-cell configuration\u003c\/li\u003e\n\u003cli\u003eNominal size: 14 inches\u003c\/li\u003e\n\u003cli\u003eFits: Goodman GMNT040-3B furnace\u003c\/li\u003e\n\u003cli\u003eMaterial: Aluminized\/corrosion-resistant steel\u003c\/li\u003e\n\u003cli\u003eOEM Part Number: 4821400S\u003c\/li\u003e\n\u003cli\u003eBrand: Goodman\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eThis is a genuine Goodman OEM exchanger built to the exact cell geometry and metallurgy of the original. Generic exchangers may vary in cell spacing and weld quality, which can affect flame pattern, drum switch tripping, and long-term durability. For a combustion-side component, OEM fit is strongly recommended to preserve the manufacturer's safety rating and warranty coverage.\u003c\/p\u003e\u003ch3\u003eInstall Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eAdvanced — Professional installation required.\u003c\/strong\u003e Heat exchanger replacement involves burner removal, gas line disconnection, and combustion re-verification with a CO analyzer. This repair should be performed only by a licensed HVAC technician.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63058127552883,"sku":"GOODMAN-11615","price":395.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-14-in-2-cell-heat-exchanger-for-gmnt040-3b-4821400s","provider":"National HVAC Parts","version":"1.0","type":"link"}