Lennox 29M10 Expansion Valve

The Lennox 29M10 Expansion Valve (OEM #104646-01) is a specialized mechanical metering device engineered for precise refrigerant control in Lennox R-410A systems. As a primary Thermostatic Expansion Valve (TXV), it utilizes a 1/4-inch flare connection to regulate liquid refrigerant flow into the evaporator coil. This HVAC expansion valve replacement is essential for maintaining target superheat levels, preventing liquid slugging, and ensuring the compressor operates within its designed performance envelope. Constructed from high-grade, corrosion-resistant brass, the 29M10 is built to withstand high-pressure environments up to 700 psi. By responding dynamically to load changes via its integrated sensing bulb and external equalizer, this Lennox HVAC part optimizes heat transfer efficiency across various residential and light commercial air conditioning applications. For technicians performing a TXV valve repair, this component ensures a direct fit and seamless integration with existing Lennox liquid lines, restoring system equilibrium and cooling capacity without the need for extensive field modifications.

• Precise Superheat Management: Maintains optimal refrigerant flow to protect the compressor and maximize evaporator efficiency.
• R-410A Compatibility: Specifically calibrated for high-pressure HFC refrigerants used in modern Lennox air conditioner parts.
• Durable Brass Construction: High-strength material ensures longevity and resistance to vibration and environmental wear.
• Swifts Response to Load: The sensing bulb accurately detects temperature fluctuations to adjust flow rate in real-time.

Is the Lennox 29M10 compatible with older R-22 systems?
No, this specific thermal expansion valve is designed for R-410A systems. Using it with R-22 will result in improper metering and potential system failure.

What is the connection size for this TXV?
The valve features a standard 1/4-inch flare inlet, making it a standard fit for compatible Lennox liquid line assemblies.

Does this valve require an external equalizer?
Yes, the 29M10 is an externally equalized valve, which is necessary for systems with high pressure drops across the evaporator coil.

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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.