the factory recommends verifying fitting requirements like part #331886401

installing this 100093794 control valve restores the proper modulation needed for safe operation

which causes lubrication loss during startup

5-Inch Precision: Provides a perfect seal for compatible units

Lennox 16U11 Collector Box Freon the factory recommends verifying fittingThe 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