Nidec-US Motors N331 Inducer Assembly 323080-701 or an "Open Ignitor" fault

or an "Open Ignitor" fault code on the integrated furnace control board

for low-pressure steam applications

Which parts does the 3H0400780003 replace

It is highly recommended to use this OEM Lennox 25B77 Air Handler Control rather than a universal board to ensure all proprietary safety sequences and ramp-up profiles are maintained

Nidec-US Motors N331 Inducer Assembly 323080-701 or an "Open Ignitor" faultThe Nidec US Motors N331 Inducer Assembly is a high performance 460V draft inducer blower designed for specialized commercial HVAC applications. Operating at 1 10 HP, this single speed centrifugal blower ensures precise flue gas exhaustion and proper combustion airflow. Engineered as a robust replacement for N331 motors, it features a heavy duty housing and a balanced wheel to minimize vibration and bearing wear during continuous operation. This