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The Goodman 4810007S Flue Collector Box is a genuine OEM combustion-venting component engineered for the GMNT120-5D gas furnace. The collector box channels flue gases from the heat exchanger cells to the inducer and vent system, maintaining proper draft and safe evacuation of combustion byproducts. A cracked, corroded, or rusted-through collector box can cause draft-pressure faults, inducer lockouts, and dangerous flue-gas spillage — replacing it with the correct OEM part restores factory sealing and combustion performance.
This is a factory OEM Goodman part built to exact tolerances for the GMNT120-5D cabinet and heat exchanger geometry. Generic or universal collector boxes rarely match the OEM gasket surfaces and mounting pattern, risking flue leaks and failed combustion-safety tests. For a furnace safety component, OEM fit is strongly recommended.
Advanced — Professional recommended. Requires partial furnace disassembly, gasket replacement, and post-install combustion/draft verification. Because this part handles flue gases, installation should be completed and safety-checked by a licensed HVAC technician.