Reznor 123974 Fan Switch Els PW 17895 Optimized Torque: Delivers precise 108-130

Optimized Torque: Delivers precise 108-130 µF capacitance to boost motor starting efficiency and reduce start-up time

including specific Reznor unit heaters

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Field Proven Durability: Standardized Johnson Controls pneumatic parts footprint for rapid retrofit or replacement

While this kit handles the standard fuel conversion

Reznor 123974 Fan Switch Els PW 17895 Optimized Torque: Delivers precise 108-130The 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