This is a thermal expansion control valve intended to manage pressure increases from water heating

By keeping the lubricant at a temperature above the refrigerant saturation point

particularly power vent (PDV) and atmospheric models manufactured after 2019 that utilize the updated FV sensor resistance profiles

Advanced Noise Suppression: Effectively filters "dirty" power and harmonic distortion generated by high-draw motors

Lennox 13Y21 TXV Valve Freon This is a thermal expansionThe Lennox 13Y21 is a high performance 5 Ton R410A TXV engineered specifically for outdoor condensing units. As a veteran grade thermal expansion valve, this OEM component provides critical refrigerant metering for 5 ton split systems, ensuring the evaporator coil remains optimally flooded across varying load conditions. It features a robust TR6 valve body designed to handle a maximum working pressure of up to 660 PSIG, making it a reliable choice for