{"product_id":"oem-goodman-heat-exchanger-for-gds80703ana-furnace-2921306s","title":"OEM Goodman Heat Exchanger for GDS80703ANA Furnace — 2921306S","description":"\u003ch2\u003eGoodman 2921306S Heat Exchanger\u003c\/h2\u003e\u003cp\u003eThe Goodman 2921306S is a genuine OEM primary heat exchanger assembly built for the \u003cstrong\u003eGDS80703ANA\u003c\/strong\u003e gas furnace. The heat exchanger is the heart of the furnace — burner flames heat its steel tubes while the blower passes conditioned air across the outside, transferring heat to the home while keeping combustion byproducts safely separated from the airstream. A cracked, rusted, or perforated exchanger is a serious safety concern because it can allow carbon monoxide to mix with supply air, so a confirmed failure means replacement, not repair.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eOEM Part Number: 2921306S\u003c\/li\u003e\n\u003cli\u003eType: Primary tubular\/clamshell heat exchanger assembly\u003c\/li\u003e\n\u003cli\u003eFunction: Transfers combustion heat to airflow while isolating flue gases\u003c\/li\u003e\n\u003cli\u003eFits: Goodman GDS80703ANA and compatible 80% AFUE furnaces\u003c\/li\u003e\n\u003cli\u003eEquipment: Gas furnace primary heat exchanger\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eA heat exchanger is a certified, pressure-tested combustion component — there is no legitimate universal equivalent. This \u003cstrong\u003egenuine Goodman OEM\u003c\/strong\u003e assembly matches the exact tube geometry, burner alignment, and cabinet fit the furnace was engineered and safety-listed with. Installing anything other than the correct OEM exchanger can void warranties and compromise safe operation.\u003c\/p\u003e\u003ch3\u003eInstallation\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eDifficulty: Advanced — professional installation required (3–5+ hours).\u003c\/strong\u003e Replacing a heat exchanger involves removing the burners, gas valve, inducer, and often pulling the entire cell from the cabinet, then re-verifying gasket seals, gas pressure, temperature rise, and combustion draft. This work must be performed by a licensed HVAC technician with combustion analysis tools and a CO check. Given the age and labor involved, compare the total repair cost against furnace replacement before proceeding.\u003c\/p\u003e\u003cp\u003eGenuine OEM safety component. Confirm your model and existing part number before ordering.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63058075812211,"sku":"GOODMAN-10304","price":574.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-heat-exchanger-for-gds80703ana-furnace-2921306s","provider":"National HVAC Parts","version":"1.0","type":"link"}