Lennox 69M40 Limit Switch 322057-301 Never attempt to use this

Never attempt to use this valve with LP without the proper spring and orifice modifications

this two-way normally closed valve provides precise flow control in HVAC systems

This model is fully compatible with glycol-based systems and can double as an anti-vacuum device during system drainage

This unit supports specific Category II and Category IV venting requirements where precise exhaust gas regulation is critical for system longevity and code compliance

Rated for up to 1200W resistive loads at 120V/240V AC

Lennox 69M40 Limit Switch 322057-301 Never attempt to use thisThe Lennox 69M40 Limit Switch is a critical OEM safety component engineered for precise thermal monitoring in residential and commercial heating systems. This L170 40F limit switch operates on an automatic reset logic, featuring a fixed cut out temperature of 170F and a cut in temperature of 140F. Designed as a genuine Lennox replacement part, the 69M40 ensures consistent circuit interruption to prevent heat exchanger damage or hazardous overheating