Integarl Mounting Flange or Strap and Bracket for Duct Mounting

and ensure your motor rotation is clockwise (CW) when looking at the discharge side

ensuring bolt-hole alignment and flow capacity

This switch is calibrated to close the circuit at 257 PSI and open it at 126 PSI

Universal Compatibility: Seamlessly integrates with copper

Lennox 56W21 Limit Switch 318820-201 Integarl Mounting Flange or StrapThe Lennox 56W21 Limit Switch is a critical safety component designed for precise thermal monitoring in high efficiency furnaces and air handlers. This L160 30F limit switch is engineered to open the electrical circuit at 160F on a temperature rise and feature an automatic reset once the plenum cools to 130F. As a veteran grade HVAC replacement part, it is a direct match for the Lennox 46105 002 and is compatible with a wide array of Allied Air brands