Lennox 16U11 Collector Box

The Lennox 16U11 Collector Box is a critical OEM replacement part designed for high-efficiency condensing furnaces. Also recognized by manufacturer number 619598-11, this cold end header box kit is engineered to manage condensate collection and facilitate proper pressure switch monitoring within the combustion circuit. When a primary collector box develops cracks or seal failure, it often manifests as furnace pressure switch lockout codes or water leakage within the cabinet, compromising both sequence of operation and structural integrity. This kit provides a direct-fit solution to restore the pneumatic seal and ensure reliable condensate drainage.

This comprehensive collector box replacement kit includes the main housing and an assembly bag containing essential components: a condensate trap (103429-01), vinyl caps, drain clamps, hosing, and a 3/4-inch street elbow. By utilizing genuine Lennox HVAC parts, technicians ensure that the inducer motor maintains the precise static pressure required for the high-fire and low-fire stages. The Lennox 16U11 is built from high-durability composite materials designed to withstand the thermal cycling and acidic nature of furnace condensate, preventing future condensing furnace leaks and maintaining peak AFUE performance.

Key Benefits:

• Direct OEM Fit: Ensures 100% compatibility with specific Lennox G-series and ML-series furnace models without field modifications.
• Restores Pressure Calibration: Eliminates nuisance trips by providing clean, unobstructed ports for pressure switch sensing lines.
• Complete Installation Package: Includes gaskets, seals, and mounting hardware to prevent bypass leaks and secondary water damage.
• Optimized Condensate Flow: Features updated internal baffling to improve drainage efficiency and prevent siphoning issues.

Common Questions:

• Why is my furnace leaking water from the collector box? Cracks often form due to over-tightened fasteners or freeze-thaw cycles in unconditioned spaces; replacing the box is the only reliable fix.
• Does the 16U11 kit include the pressure switches? No, this kit focuses on the cold end header assembly and mounting hardware, though it provides the stable platform necessary for correct switch operation.
• Will this fix a 'Pressure Switch Stuck Open' error? If the error is caused by water backup or a cracked port on the existing box, this replacement kit will resolve those specific mechanical failures.

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.