Carrier 331709-752 TXV Replacement

The Carrier 331709-752 TXV Replacement Kit is a field-proven thermostatic expansion valve designed specifically for 3.5 to 4-ton evaporator coils. Engineered for R-22 refrigerant systems, this hard shut-off TXV modulates flow based on the technical cooling load, preventing liquid slugging to the compressor while maintaining precise superheat control. As a Factory Authorized Part, it serves as a drop-in replacement for legacy ICP and Carrier part numbers, including EA36YD046, ensuring meet-or-exceed performance for Carrier, Bryant, and Payne residential split systems. This HVAC expansion valve kit includes the required sensing bulb, equalizer line, and mounting hardware to streamline installation during a TXV repair. Experienced contractors utilize this OEM replacement valve to restore system efficiency and ensure the liquid line pressure is correctly metered into the low side of the refrigeration cycle. By maintaining the correct refrigerant flow, this component protects the internal valves of the compressor and maximizes the heat transfer surface area of the evaporator coil.

• Precision superheat management prevents liquid floodback, extending the operational life of the compressor.
• Optimized for 3.5 to 4-ton applications, providing R-22 refrigerant metering accuracy for older residential units.
• Factory Authorized Part status ensures exact physical fit and port alignment with existing Carrier HVAC service lines.
• Hard shut-off design eliminates the need for a start capacitor in many split system air conditioner applications.
• Comprehensive kit simplifies the upgrade from older piston or fixed-orifice metering devices to a more efficient TXV system.

Is this TXV compatible with R-410A systems?
No, the 331709-752 is specifically calibrated for R-22 refrigerant pressure-temperature curves. For R-410A applications, you must use a valve with the appropriate power element charge.

Does this kit include the sensing bulb insulation?
Yes, standard Carrier TXV replacement kits include the valve body, sensing bulb, and the necessary insulation and mounting hardware to ensure accurate temperature sensing on the suction line.

What tonnage is this valve rated for?
This specific model is engineered for systems ranging from 3.5 to 4.0 tons. Verify your indoor coil capacity before installation to ensure the metering device matches the system load.

This item is not eligible for free shipping.

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.