While the coil operates on a 24V signal

while a "wet" reading signals that a drier change-out is required to prevent acid buildup and thermal expansion valve freeze-ups

reducing internal vibration and extending the operational lifecycle of the draft inducer assembly

310263-779

Lochinvar & A.O. Smith 100111904 Board 319847-401 While the coil operates onThe Lochinvar & A. O. Smith 100111904 Power Distribution Board is a critical OEM replacement part engineered for high performance commercial water heating systems and boiler controls. As a primary voltage distribution center, this board manages the complex electrical pathways necessary for heating cycle regulation and robust system diagnostics. Designed to meet the precise tolerances of Lochinvar and A. O. Smith hydronic systems, it facilitates