Maintenance-Free Design: No moving parts reduce the risk of mechanical failure in turbulent tanks or high-vibration environments

making it a versatile truck-stock item for Lennox service calls

Fail-Safe Security: Robust spring return mechanism ensures the valve defaults to a normally closed state during power interruptions

Whether you are performing a seasonal PM or an emergency motor swap

Lennox 70M29 Expansion Valve Refrigerant Maintenance-Free Design: No moving partsThe Lennox 70M29 Expansion Valve is a critical OEM replacement part engineered for precise refrigerant metering in residential and commercial cooling systems. This thermostatic expansion valve (TXV) is designed to regulate flow based on evaporator load, ensuring maximum heat exchange efficiency and preventing liquid slugging in the compressor. The 70M29 is technically identical to 70M2901 and serves as a direct replacement for legacy part numbers