Reznor 123974 Fan Switch Els PW 17895 Heavy-Duty Construction: Built with a

Heavy-Duty Construction: Built with a 30 Amp 2 Pole configuration to withstand high inrush currents during compressor startup

Is the Armstrong A21958-1 compatible with all B-Series traps

Is the Danfoss 023Z0014 compatible with sub-critical CO2 systems

this specific model is designed for a 1"-14 thread

Reznor 123974 Fan Switch Els PW 17895 Heavy-Duty Construction: Built with aThe 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