When a header fails or becomes restricted

immediate replacement is necessary to prevent compressor failure

Does this unit replace 2-wire or 4-wire sequencers

ensuring the hub is securely seated on the motor shaft is vital to preventing vibration-induced failure

Lennox 45M66 Collar Assembly 321142-301 When a header fails orThe Lennox 45M66 Collar Assembly is an essential OEM replacement part designed specifically for high efficiency HVAC cabinet and ductwork transitions. This Right Hand Collar Assembly (part number LB 96380A) provides the structural interface required to maintain rigid connections at the unit discharge or return plenum, ensuring no static pressure loss at critical junction points. Manufactured to original Lennox HVAC equipment tolerances, the 45M66