Lennox 71W28 Gasket

As a seasoned technician, you know that a compromised seal on a 70/90 furnace can lead to pressure switch trips and combustion inefficiency. The Lennox 71W28 Gasket is the specific OEM collector box gasket designed to restore the airtight integrity of the flue system. Specifically engineered for Lennox furnace repair, this component (also identified as part number 102515-01) ensures that exhaust gases are properly contained within the collector box before being vented through the inducer motor. Its high-heat resistant construction is built to withstand the rigorous thermal cycling of high-efficiency condensation processes in 90% AFUE units.

Precision fitment is critical in avoiding air leakage that can degrade system performance or cause premature component failure. This furnace collector box seal is compatible with a broad range of Lennox series, including the EL195DF, EL196UH, ML193UH, and 95AF models. Whether you are performing a seasonal teardown or a full collector box replacement, using this genuine Lennox HVAC replacement part ensures the blower and collector box interface remains leak-proof, maintaining the precise static pressure required for optimal burner operation.

• Direct OEM Fit: Eliminates the need for "make-it-work" field modifications, ensuring a perfect seal between the collector box and the heat exchanger.
• Durable Material Composition: High-grade, heat-resistant elastomer prevents hardening and cracking under extreme furnace temperatures.
• Optimized Combustion: Prevents secondary air leaks that can throw off the fuel-to-air ratio, helping maintain peak AFUE ratings.
• Wide Compatibility: Standardized for 70/90 furnace applications across multiple Lennox and Allied Air platforms.

Does this gasket require additional RTV sealant during installation?
While the Lennox 71W28 is designed to provide a mechanical seal, always refer to the specific Lennox service manual for your furnace model; some high-efficiency condensing units may require a specific bead of high-temp silicone in conjunction with the gasket for a 100% airtight assembly.

Will this gasket fix a "Pressure Switch Stuck Open" fault?
If the fault is caused by a vacuum leak at the collector box, replacing a worn or brittle 71W28 gasket is a primary diagnostic step to restore proper pressure readings to the switch.

Is this compatible with 80% non-condensing furnaces?
This specific collector box gasket is primarily utilized in the 70/90 series condensing units where moisture and secondary heat exchange management is required.

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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.