Lennox 21L87 TXV

Maintain precise system balance with the Lennox 21L87 TXV, a genuine OEM thermostatic expansion valve designed specifically for Lennox air conditioning and heat pump units. This valve is engineered to modulate refrigerant flow dynamically based on the cooling load, ensuring the evaporator operates at peak efficiency. By maintaining the optimal superheat at the evaporator outlet, the 21L87 prevents liquid slugging and protects the compressor from premature failure. Whether you are performing a TXV replacement on a residential split system or a commercial package unit, this 150951-009 model ensures a direct fit and reliable performance. As a veteran technician knows, using genuine Lennox parts is critical for restoring factory-spec HVAC efficiency and avoiding the common troubleshooting headaches associated with generic alternatives.

Key Benefits:

• Precise Superheat Control: Automatically adjusts refrigerant metering to respond to load changes, maximizing heat transfer.
• System Protection: Effectively prevents liquid refrigerant from reaching the compressor, extending the life of the entire HVAC system.
• OEM Compatibility: Guaranteed to meet the exact technical specifications for Lennox 150951-009 and 21L87-01 part numbers.
• Enhanced Efficiency: Optimizes evaporator coil performance for lower energy consumption and consistent climate control.

Common Questions:

What are the symptoms of a failing Lennox 21L87 TXV?
Common indicators include high superheat, low suction pressure, or a frozen evaporator coil. If the valve is stuck closed, you will likely see refrigerant flow restrictions that starve the coil.

Can I use this valve for both AC and Heat Pump systems?
Yes, this thermal expansion valve is designed for specific Lennox air conditioners and heat pumps. Always verify your specific model and serial number to ensure proper metering and compatibility.

Does this valve include the sensing bulb?
Yes, this is a complete assembly with the power head and sensing bulb. Remember to insulate the bulb properly on the suction line and protect the valve body with a wet rag during brazing to avoid damaging internal components.

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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.