Lennox 42W37 TXV
The Lennox 42W37 Thermal Expansion Valve (TXV) is a critical HVAC refrigerant metering device engineered for precision performance in 3-ton air conditioning systems and heat pump applications. This OEM Lennox 42W37 valve features a 3/8" x 1/2" ODF connection with a sweat-fit design, ensuring a leak-resistant seal for professional installations. Utilizing a brass body for enhanced corrosion resistance, this R-410A expansion valve maintains the correct superheat and evaporator efficiency by modulating refrigerant flow based on real-time load requirements. Designed for seamless integration with Lennox evaporative coils—including models like the 42W38, 42W39, and 42W40—the 42W37 TXV prevents compressor slugging and liquid floodback, significantly extending the life of the cooling circuit. This factory-calibrated refrigerant valve is the standard for technicians performing TXV replacements to restore system SEER ratings and indoor comfort levels in residential and light commercial equipment.
- System Optimization: Accurately regulates refrigerant flow to maintain target superheat across varying outdoor ambient temperatures.
- Direct Compatibility: Genuine Lennox replacement part (also identified as 100679-24) ensures exact fitment for 3-ton R-410A units without field modifications.
- Robust Construction: Hard-wearing brass housing and high-quality internal diaphragm designed to withstand high-pressure fluctuations and thermal cycling.
- Energy Efficiency: Improves overall system responsiveness, reducing duty cycles and maximizing the performance of the heat exchanger.
Common Questions
What are the symptoms of a failing Lennox 42W37 TXV?
Common indicators include evaporator coil icing, high superheat readings, or the system getting "stuck" in a low-capacity state due to a restricted or hunting valve. Always verify pressures before diagnosing a failed thermal expansion valve.
Is this valve compatible with refrigerants other than R-410A?
No, this specific 42W37 3-ton TXV is calibrated and designed exclusively for R-410A refrigerant systems. Using it with R-22 or newer A2L refrigerants will result in improper metering and potential damage.
Can I use this TXV on a 2.5-ton or 3.5-ton system?
It is specifically rated for 3-ton capacity. For best results and to maintain proper operational characteristics, always match the tonnage of the expansion valve to the evaporator coil and condenser rating.
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: $140.62
-65%$140.62
$49.22Lennox 42W37 TXV
The Lennox 42W37 Thermal Expansion Valve (TXV) is a critical HVAC refrigerant metering device engineered for precision performance in 3-ton air conditioning systems and heat pump applications. This OEM Lennox 42W37 valve features a 3/8" x 1/2" ODF connection with a sweat-fit design, ensuring a leak-resistant seal for professional installations. Utilizing a brass body for enhanced corrosion resistance, this R-410A expansion valve maintains the correct superheat and evaporator efficiency by modulating refrigerant flow based on real-time load requirements. Designed for seamless integration with Lennox evaporative coils—including models like the 42W38, 42W39, and 42W40—the 42W37 TXV prevents compressor slugging and liquid floodback, significantly extending the life of the cooling circuit. This factory-calibrated refrigerant valve is the standard for technicians performing TXV replacements to restore system SEER ratings and indoor comfort levels in residential and light commercial equipment.
- System Optimization: Accurately regulates refrigerant flow to maintain target superheat across varying outdoor ambient temperatures.
- Direct Compatibility: Genuine Lennox replacement part (also identified as 100679-24) ensures exact fitment for 3-ton R-410A units without field modifications.
- Robust Construction: Hard-wearing brass housing and high-quality internal diaphragm designed to withstand high-pressure fluctuations and thermal cycling.
- Energy Efficiency: Improves overall system responsiveness, reducing duty cycles and maximizing the performance of the heat exchanger.
Common Questions
What are the symptoms of a failing Lennox 42W37 TXV?
Common indicators include evaporator coil icing, high superheat readings, or the system getting "stuck" in a low-capacity state due to a restricted or hunting valve. Always verify pressures before diagnosing a failed thermal expansion valve.
Is this valve compatible with refrigerants other than R-410A?
No, this specific 42W37 3-ton TXV is calibrated and designed exclusively for R-410A refrigerant systems. Using it with R-22 or newer A2L refrigerants will result in improper metering and potential damage.
Can I use this TXV on a 2.5-ton or 3.5-ton system?
It is specifically rated for 3-ton capacity. For best results and to maintain proper operational characteristics, always match the tonnage of the expansion valve to the evaporator coil and condenser rating.
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.
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Description
The Lennox 42W37 Thermal Expansion Valve (TXV) is a critical HVAC refrigerant metering device engineered for precision performance in 3-ton air conditioning systems and heat pump applications. This OEM Lennox 42W37 valve features a 3/8" x 1/2" ODF connection with a sweat-fit design, ensuring a leak-resistant seal for professional installations. Utilizing a brass body for enhanced corrosion resistance, this R-410A expansion valve maintains the correct superheat and evaporator efficiency by modulating refrigerant flow based on real-time load requirements. Designed for seamless integration with Lennox evaporative coils—including models like the 42W38, 42W39, and 42W40—the 42W37 TXV prevents compressor slugging and liquid floodback, significantly extending the life of the cooling circuit. This factory-calibrated refrigerant valve is the standard for technicians performing TXV replacements to restore system SEER ratings and indoor comfort levels in residential and light commercial equipment.
- System Optimization: Accurately regulates refrigerant flow to maintain target superheat across varying outdoor ambient temperatures.
- Direct Compatibility: Genuine Lennox replacement part (also identified as 100679-24) ensures exact fitment for 3-ton R-410A units without field modifications.
- Robust Construction: Hard-wearing brass housing and high-quality internal diaphragm designed to withstand high-pressure fluctuations and thermal cycling.
- Energy Efficiency: Improves overall system responsiveness, reducing duty cycles and maximizing the performance of the heat exchanger.
Common Questions
What are the symptoms of a failing Lennox 42W37 TXV?
Common indicators include evaporator coil icing, high superheat readings, or the system getting "stuck" in a low-capacity state due to a restricted or hunting valve. Always verify pressures before diagnosing a failed thermal expansion valve.
Is this valve compatible with refrigerants other than R-410A?
No, this specific 42W37 3-ton TXV is calibrated and designed exclusively for R-410A refrigerant systems. Using it with R-22 or newer A2L refrigerants will result in improper metering and potential damage.
Can I use this TXV on a 2.5-ton or 3.5-ton system?
It is specifically rated for 3-ton capacity. For best results and to maintain proper operational characteristics, always match the tonnage of the expansion valve to the evaporator coil and condenser rating.
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.
