Lochinvar & A.O. Smith 100289391 Pressure Switch 319847-401 providing flexibility across different furnace

providing flexibility across different furnace and air handler platforms

Can this part replace mechanical thermostats in older Carrier units

and water-glycol solutions used in commercial and industrial heating systems

This kit is specifically engineered to fit SORIT-12

Heavy-duty 1/4" wire diameter for enhanced durability in steam service

Lochinvar & A.O. Smith 100289391 Pressure Switch 319847-401 providing flexibility across different furnaceThe Lochinvar & A. O. Smith 100289391 Pressure Switch is a critical safety component engineered for high efficiency condensing water heaters and commercial boilers. Calibrated to a 0. 55" WC (Water Column) set point, this direct replacement for 100294588 monitors the induced draft blower to ensure proper venting of combustion gases. In the field, this switch is the primary defense against blocked flue conditions and inducer motor failure, preventing