the Nordyne 626499R Limit Switch is the direct OEM replacement you need to get the furnace back in sequence

Always verify your specific system temperature against the Buna N seat limitations

and debris that compromise system calibration

I know that a secure actuator mount is the difference between reliable airflow control and a service call for "slipping" linkage

Lennox 39H24 Damper Coupler the Nordyne 626499R Limit SwitchThe Lennox 39H24 Damper Coupler Left is a critical genuine OEM replacement part engineered for precise airflow management in commercial and residential Lennox HVAC systems. As a veteran technician knows, maintaining the integrity of the linkage between the damper actuator and the louver blades is essential for pressure control and ventilation efficiency. This left hand specific coupler is designed to eliminate slippage and ensure responsive adjustment