providing flexibility for fail-safe or non-fail-safe sequence of operations

replacing the S1-031-09175-000 often resolves relay failures on the board that prevent blower activation

secondary seals and packing sets should be sourced separately for a full valve rebuild

To properly couple the AV 10-18 extension to an LF actuator

triggering a precise cut-out temperature between 120-150°F to prevent overheating and potential component damage

York S1-025-31978-000 Damper Actuator 30067439-890 providing flexibility for fail-safe orThe York S1 025 31978 000 Damper Actuator is a professional grade 24V HVAC actuator specifically engineered for high cycle performance in bypass and zone controlled systems. This OEM York replacement part provides the precise torque required to modulate damper blades, ensuring balanced static pressure and efficient airflow management across multiple duct zones. Built for seamless integration with zoning system controllers, the S1 025 31978 000