Lennox 93L84 Collector Box

The Lennox 93L84 Collector Box (also identified by part number LB-99004A) is a critical OEM replacement component designed for high-efficiency condensing gas furnaces. As a veteran technician knows, the collector box is the central hub for managing corrosive condensate before it enters the drain trap. Over time, heat cycling and acidic residue can lead to stress cracks or seal failure in the composite housing, causing pressure switch trips or water pooling in the burner compartment. This genuine furnace collector box assembly ensures a precise fit to the heat exchanger, maintaining the airtight seal required for the inducer motor to pull the correct vacuum. Replacing a compromised 93L84 Lennox part is essential for preventing the combustion gases from bypassing the venting system. This unit is engineered to withstand the demanding thermal environment of Lennox G24 and G32 series models, though you should verify specific serial compatibility to ensure the integrated baffles and port alignments match your field requirements.

• OEM Engineering: Guaranteed Lennox 93L84 specifications ensure hole patterns and port diameters match factory standards for immediate installation.
• System Integrity: Prevents common inducer-related "air codes" and pressure switch failures caused by hairline fractures in the collector housing.
• Condensate Management: Durable composite material resists the acidic byproduct of high-efficiency combustion, preventing secondary damage to the furnace cabinet.
• Direct Replacement: Replaces legacy part numbers LB-99004A and 93L84 with updated material resilience.

Does this collector box include the rear mounting gasket?
Most OEM collector boxes come with factory-installed port seals, but we recommend applying a thin bead of high-temperature RTV silicone or specialized gasket material to the heat exchanger interface to ensure a 100% airtight seal.

Why is my furnace leaking water from the collector box area?
Leaks in this area typically indicate a cracked housing or a failed seal at the inducer mounting point. In high-efficiency units, the 93L84 must be intact to prevent hazardous condensate leaks from damaging the control board below.

Can I repair a crack in my existing Lennox collector box?
Internal pressures and thermal expansion make temporary epoxy fixes unreliable. Replacing the assembly with a genuine Lennox 93L84 is the only professional method to restore safe equipment operation.

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.