this switch simplifies field installation for veteran technicians managing complex air distribution networks

Broad Compatibility: An official Lennox OEM part that serves as a direct drop-in replacement for part numbers 17L40 and LB-89289D

9k Ohms at 70°F) using a calibrated multimeter to confirm the part is within manufacturer specifications before installation

The double-shielded ball bearing design comes factory-lubricated

this model features an adjustable differential scale

Lau 0574300003M Blower Assembly 323055-751 this switch simplifies field installationThe Lau 0574300003M Blower Assembly is a heavy duty belt drive blower engineered for residential and light commercial HVAC applications. Known by the model designation A9 9ACE, this unit features a 3 4" shaft size precision ground from high grade steel to ensure concentricity and reduced vibration during high torque operation. With nominal dimensions of 11 7 8" x 10 1 4", the assembly serves as an essential component for air handlers, furnaces, and