Reznor 123974 Fan Switch 30067439-890 Extended Motor Lifecycle: Reduces friction

Extended Motor Lifecycle: Reduces friction and evenly spreads bearing forces to prevent the rotor from interfering with the stator

the PSM24A24DAS ensures stable performance for critical I/O modules and BAS networking hardware in demanding environments ranging from -30 to 140

the 7JES (part number 004250) utilizes a one-piece split design

it offers a drop-in fit with 1/4-inch quick-connect terminals

requiring no manual calibration

Reznor 123974 Fan Switch 30067439-890 Extended Motor Lifecycle: Reduces frictionThe 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