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Replacing a brittle 780643 igniter with this genuine 100165926 HVAC part stabilizes resistance and prevents the nuisance 3-flash flame failure errors common in aging Power-fin and Knight-style units
the 067N9403 ensures stable superheat control across its operating range
always verify the center-to-center bolt dimensions before installation
Contractors often report "rumbling" or "pulsating" during the ignition phase
Lennox 72W41 Motor 322056-301 Replacing a brittle 780643 igniterThe Lennox 72W41 is a high performance 1 2 HP 120 240V ECM blower motor specifically designed for Lennox HVAC systems. As a critical component in variable speed air handlers and furnaces, this motor operates at a nominal 1250 RPM and provides precise airflow modulation to maintain consistent static pressure. Its dual voltage capability (120 240V) and 50 60Hz compatibility make it a versatile direct OEM replacement motor for contractors servicing
