Carrier EA36YD129 TXV

The Carrier EA36YD129 is a precise 2-ton thermostatic expansion valve (TXV) designed to maintain target superheat across varying evaporator loads. This R-410A refrigerant metering device is a critical OEM replacement part for Carrier, Bryant, and Payne air handlers and cased coils. It utilizes a bolt-on design for straightforward installation, ensuring reliable refrigerant flow control to prevent liquid slugging of the compressor while maximizing heat transfer efficiency. The thermal sensing bulb is engineered for accurate pressure-temperature feedback, making it essential for balancing system performance in high-efficiency residential split systems and packaged units. By maintaining the correct evaporator pressure, this valve protects the HVAC compressor and ensures the system hits its rated SEER performance. When diagnosing refrigerant metering issues or restricted flow, replacing the existing assembly with this genuine OEM TXV kit ensures factory-spec compatibility and long-term mechanical reliability in demanding cooling applications.

• OEM Compatibility: Precision-fit replacement TXV for Carrier-branded 2-ton cooling systems.
• Optimized Superheat: Maintains strict control over R-410A flow to protect the compressor from liquid floodback.
• Mechanical Connection: Features a bolt-on installation style that eliminates the need for brazing near sensitive internal components.
• System Efficiency: Restores factory-rated heat exchange performance and cooling capacity in air-source systems.

Common Technical Questions

What are the signs of a failing EA36YD129 TXV?
Technicians often encounter low suction pressure and high superheat readings when the valve is stuck closed, or frost on the evaporator coil if it is stuck open. Verification requires checking the sensing bulb placement and checking for a refrigerant restriction at the internal screen.

Is this TXV compatible with R-22 systems?
No, this component is specifically calibrated for R-410A pressure-temperature characteristics. Utilizing this valve with R-22 will result in improper metering and potential system damage.

Does this kit include the sensing bulb insulation?
This HVAC replacement part is the valve assembly itself. We recommend using technician-grade cork tape or foam insulation to securely mount the bulb to the suction line for accurate sensing.

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.