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this unit features a Manual Reset mechanism and a Single Pole Double Throw (SPDT) switch configuration
Integrated Linkage: Comes complete with a bronze-bushed clevis and bracket for immediate damper actuator installation
Features OEM compatibility with legacy Lennox and Allied Air models
Key Benefits for Contractors High-Capacity Switching: Rated for up to 30 Amps
front cover gasket
Reznor 123974 Fan Switch 30067439-890 this unit features a ManualThe Reznor 123974 Fan Switch is a precise thermal control engineered for gas fired unit heaters and duct furnaces. Designed to manage blower cycles based on internal heat exchanger temperatures, this F135 30F fan control ensures the fan engages when the plenum reaches 135F and terminates operation once it cools to 105F (30F differential). As a direct replacement for part 48706, it maintains the critical timing required to prevent heat exchanger stress
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