Lennox 17F28 Collector Box

When you're dealing with a residential furnace that isn’t pulling the right vacuum or is leaking condensate at the base of the cabinet, the Lennox 17F28 Collector Box (also referred to as a cold end header box kit) is often the primary suspect. This 28-inch OEM replacement is specifically engineered for Lennox Model 28 HVAC systems and high-efficiency gas furnaces where proper moisture management is critical. As a HVAC collector box replacement, it serves as the central hub for collecting condensate from the secondary heat exchanger before it transitions to the drain trap. Over time, original composite boxes can develop stress cracks or become restricted by internal sediment, leading to pressure switch "stuck open" codes or furnace water leaks that damage the heat exchanger’s integrity.

Replacing a compromised Lennox furnace collector box with this genuine Lennox 17F28 ensures that your inducer motor maintains the precise negative pressure required to close the safety circuit. Since this is a condensate collector box kit, it is designed to withstand the acidic nature of furnace runoff, preventing premature degradation of the heat exchanger components. For the veteran tech, this means a reliable "one-and-done" fix that restores HVAC system efficiency and protects the secondary cooling or heating coils from bypass moisture.

• OEM Compatibility: Precision-molded to fit the Lennox Model 28 chassis, ensuring all mounting points and port alignments match the original factory specifications.
• Enhanced Condensate Drainage: Optimized internal geometry prevents the pooling that leads to "sludge" buildup and pressure switch port blockages.
• System Protection: Acts as a critical barrier, preventing corrosive condensate from leaking into the burner compartment or onto the furnace control board.
• Restored Pressure Sensitivity: Seamless integration with the pressure switch tubing ensures accurate vacuum readings for the inducer assembly.

How do I know if the collector box is cracked versus a blocked trap?
If you see water pooling inside the cabinet specifically near the inducer motor or the bottom of the secondary heat exchanger frame, inspect the 17F28 for hairline fractures. If the furnace is tripping a pressure switch code but the tubing is clear, check for a cracked internal port on the Lennox 17F28 that might be bleeding vacuum.

Does this kit include a new gasket?
Proper sealing is non-negotiable for HVACR technical maintenance. We recommend verifying the condition of the existing perimeter seal or applying a fresh bead of high-temp RTV or an OEM gasket to prevent air bypass and water leaks after installation.

What causes these boxes to fail prematurely?
Excessive heat from secondary heat exchanger issues or improper furnace slope can lead to localized stress. Always ensure the furnace has the manufacturer-recommended pitch toward the drain to prevent standing acidic water within the collector box.

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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.