Lennox 17F50 Header Box Kit

The Lennox 17F50 Cold End Header Box Kit is a critical OEM replacement part designed for high-efficiency 90% AFUE and above condensing gas furnaces. As a primary collector box assembly, this kit manages the corrosive condensate generated during the heat exchange process, preventing fluid backup that can lead to pressure switch trips and furnace lockout. This heavy-duty header box kit (Lennox 619598-46) is engineered for a precise fit on EL296, ML195, and SLP98 series units, acting as the transition point between the secondary heat exchanger and the condensate drain trap. Built to withstand the acidic nature of furnace effluent, the Lennox 17F50 ensures structural integrity and leak-free performance. Each kit includes the essential internal collector box, high-temperature gasket, mounting hardware, and an assembly bag featuring a 77W30 condensate trap, drain hose, and street elbow. Swapping a cracked or clogged header box with this genuine HVAC replacement part restores optimal furnace drainage and maintains the suction pressure required for the combustion air inducer to operate within factory specifications.

• Comprehensive Rebuild Kit: Includes the header box, gasket, and all necessary condensate management components (77W30 trap, hoses, and clamps).
• Wide Compatibility: Direct replacement for obsolete or legacy part numbers 10F95, 75W11, 77W15, 86W20, and 95W94.
• Maintains Static Pressure: Eliminates air leaks and vacuum loss, ensuring the pressure switches detect the correct inducer motor drafting.
• Corrosion Resistance: Fabricated from high-grade polymers to resist the low-pH condensate common in condensing gas furnaces.
• Optimized Drainage: Prevents "water sloshing" sounds and inducer housing flooding, which are common symptoms of a failing collector box.

• How do I know if the header box needs replacement? Look for hairline cracks in the plastic, rust staining on the vestibule panel, or instances where the furnace shuts down on a pressure switch error while the inducer is spinning.
• Does this kit include the gasket? Yes, the Lennox 17F50 comes with the required mounting gasket to ensure a gas-tight and water-tight seal against the vestibule.
• Can I use this for a 80% AFUE furnace? No, this cold end header box is specifically designed for high-efficiency condensing units that produce liquid condensate.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.