Programmable Thermostat

This replacement thermostatic expansion valve (TXV) is engineered as a direct replacement for Lennox systems utilizing the Danfoss 067U3416 TR6 design. Built for reliability in residential and light commercial HVAC applications, this component is ideal for air conditioning systems, heat pumps, and rooftop units requiring precise refrigerant flow control. Designed specifically for R-410A refrigerant systems in the 3.5 to 5 ton capacity range, this TXV delivers consistent performance across standard residential cooling loads. The valve features a 3/4 inch Chatleff connection end style, making it compatible with common line set configurations. With an external equalizer design and non-bleed port configuration, it provides accurate superheat control while maintaining system stability. This TR6 model incorporates an integrated check valve function, allowing for efficient reverse flow operation in heat pump applications during heating cycles. The robust construction supports a maximum working pressure of 660 psig, ensuring durability in demanding operating conditions. The external equalizer line allows the valve to respond dynamically to evaporator pressure fluctuations, optimizing capacity modulation and energy efficiency. Installation professionals will appreciate the straightforward design that simplifies commissioning and troubleshooting. This component is suitable for replacement in existing Lennox systems as well as OEM integration in new equipment builds. Proper installation with correct superheat adjustment ensures optimal system performance and extended equipment life. Backed by quality construction standards, this TXV helps maintain balanced refrigerant distribution, reduce energy consumption, and prevent compressor slugging in properly sized systems.