Lennox 42W39 TXV
The Lennox 42W39 is a high-performance 3-ton thermal expansion valve (TXV) engineered for precise refrigerant metering in R410A systems. Designed to replace Lennox part 100679-26, this valve features a 5/8" ODF inlet and a 1/2" ODF outlet, ensuring a secure, leak-proof solder connection. For any technician troubleshooting a 3-ton air conditioner or heat pump, this OEM component is critical for maintaining correct superheat levels across varying load conditions. The durable brass construction and responsive sensing bulb prevent evaporator flooding and compressor slugging, providing the reliability required in demanding residential and light commercial HVAC applications. Whether you are performing a routine coil upgrade or a critical repair, this Lennox expansion valve ensures the system operates at peak thermodynamic efficiency. By accurately regulating R410A refrigerant flow, the 42W39 protects the compressor while optimizing heat exchange, making it the preferred choice for professional contractors seeking exact-fit HVAC replacement parts.
Key Benefits
- Precise Superheat Control: Automatically adjusts refrigerant flow to maintain optimal evaporator performance and protect the compressor.
- OEM Compatibility: Genuine Lennox 42W39 replacement ensures seamless integration with 3-ton Lennox and Armstrong cooling units.
- Durable Brass Body: High-grade construction designed to withstand high-pressure R410A systems and environmental stress.
- Standard ODF Connections: Features 5/8" x 1/2" ODF fittings for standard brazing procedures, reducing installation complexity for field technicians.
Common Questions
What are the symptoms of a failing Lennox 42W39 TXV?
Technicians typically observe hunting suction pressures, high superheat, or evaporator coil icing. If the valve is stuck closed, you will see low suction pressure and high head pressure; if stuck open, liquid floodback to the compressor is a major risk.
Is this valve compatible with R-22 systems?
No, the Lennox 42W39 is specifically calibrated for the pressure-temperature characteristics of R410A refrigerant. Using it with R-22 will result in improper metering and potential system failure.
Does this TXV include the sensing bulb and mounting hardware?
Yes, this thermal expansion valve comes with the integrated sensing bulb required for accurate temperature feedback from the suction line to regulate the internal diaphragm.
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.
Original: $153.21
-65%$153.21
$53.62Lennox 42W39 TXV
The Lennox 42W39 is a high-performance 3-ton thermal expansion valve (TXV) engineered for precise refrigerant metering in R410A systems. Designed to replace Lennox part 100679-26, this valve features a 5/8" ODF inlet and a 1/2" ODF outlet, ensuring a secure, leak-proof solder connection. For any technician troubleshooting a 3-ton air conditioner or heat pump, this OEM component is critical for maintaining correct superheat levels across varying load conditions. The durable brass construction and responsive sensing bulb prevent evaporator flooding and compressor slugging, providing the reliability required in demanding residential and light commercial HVAC applications. Whether you are performing a routine coil upgrade or a critical repair, this Lennox expansion valve ensures the system operates at peak thermodynamic efficiency. By accurately regulating R410A refrigerant flow, the 42W39 protects the compressor while optimizing heat exchange, making it the preferred choice for professional contractors seeking exact-fit HVAC replacement parts.
Key Benefits
- Precise Superheat Control: Automatically adjusts refrigerant flow to maintain optimal evaporator performance and protect the compressor.
- OEM Compatibility: Genuine Lennox 42W39 replacement ensures seamless integration with 3-ton Lennox and Armstrong cooling units.
- Durable Brass Body: High-grade construction designed to withstand high-pressure R410A systems and environmental stress.
- Standard ODF Connections: Features 5/8" x 1/2" ODF fittings for standard brazing procedures, reducing installation complexity for field technicians.
Common Questions
What are the symptoms of a failing Lennox 42W39 TXV?
Technicians typically observe hunting suction pressures, high superheat, or evaporator coil icing. If the valve is stuck closed, you will see low suction pressure and high head pressure; if stuck open, liquid floodback to the compressor is a major risk.
Is this valve compatible with R-22 systems?
No, the Lennox 42W39 is specifically calibrated for the pressure-temperature characteristics of R410A refrigerant. Using it with R-22 will result in improper metering and potential system failure.
Does this TXV include the sensing bulb and mounting hardware?
Yes, this thermal expansion valve comes with the integrated sensing bulb required for accurate temperature feedback from the suction line to regulate the internal diaphragm.
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.
Product Information
Product Information
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Description
The Lennox 42W39 is a high-performance 3-ton thermal expansion valve (TXV) engineered for precise refrigerant metering in R410A systems. Designed to replace Lennox part 100679-26, this valve features a 5/8" ODF inlet and a 1/2" ODF outlet, ensuring a secure, leak-proof solder connection. For any technician troubleshooting a 3-ton air conditioner or heat pump, this OEM component is critical for maintaining correct superheat levels across varying load conditions. The durable brass construction and responsive sensing bulb prevent evaporator flooding and compressor slugging, providing the reliability required in demanding residential and light commercial HVAC applications. Whether you are performing a routine coil upgrade or a critical repair, this Lennox expansion valve ensures the system operates at peak thermodynamic efficiency. By accurately regulating R410A refrigerant flow, the 42W39 protects the compressor while optimizing heat exchange, making it the preferred choice for professional contractors seeking exact-fit HVAC replacement parts.
Key Benefits
- Precise Superheat Control: Automatically adjusts refrigerant flow to maintain optimal evaporator performance and protect the compressor.
- OEM Compatibility: Genuine Lennox 42W39 replacement ensures seamless integration with 3-ton Lennox and Armstrong cooling units.
- Durable Brass Body: High-grade construction designed to withstand high-pressure R410A systems and environmental stress.
- Standard ODF Connections: Features 5/8" x 1/2" ODF fittings for standard brazing procedures, reducing installation complexity for field technicians.
Common Questions
What are the symptoms of a failing Lennox 42W39 TXV?
Technicians typically observe hunting suction pressures, high superheat, or evaporator coil icing. If the valve is stuck closed, you will see low suction pressure and high head pressure; if stuck open, liquid floodback to the compressor is a major risk.
Is this valve compatible with R-22 systems?
No, the Lennox 42W39 is specifically calibrated for the pressure-temperature characteristics of R410A refrigerant. Using it with R-22 will result in improper metering and potential system failure.
Does this TXV include the sensing bulb and mounting hardware?
Yes, this thermal expansion valve comes with the integrated sensing bulb required for accurate temperature feedback from the suction line to regulate the internal diaphragm.
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.
