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The genuine OEM Lennox 60L37 Thermal Expansion Valve (TXV) precisely meters the flow of refrigerant into the evaporator coil, matching refrigerant supply to the system's cooling load. By maintaining proper superheat, the 60L37 keeps your Lennox system operating at peak efficiency and protects the compressor from liquid floodback.
Common failure symptoms: A stuck, hunting, or failed 60L37 valve can cause poor cooling, a frosted or iced evaporator coil, unusually high or low superheat readings, short cycling, and a compressor that struggles or overheats. You may also notice hissing at the valve or inconsistent temperatures across the coil.
Why OEM matters: Expansion valves are matched to a specific refrigerant type, tonnage, and pressure range. An off-spec TXV meters incorrectly, robbing capacity and risking compressor damage. The OEM Lennox 60L37 is factory-calibrated to your system's exact requirements, ensuring correct refrigerant control, connections, and long-term reliability in your Lennox equipment.