Lochinvar & A.O. Smith 100277940 Board 321702-401 This factory-authorized part ensures direct

This factory-authorized part ensures direct physical compatibility with York

Always verify the amperage and voltage rating on your specific wiring diagram before installation

using incorrect voltage will cause immediate coil failure or fire hazard

significantly reducing the risk of refrigerant leaks

If voltage is present but the motor won't spin

Lochinvar & A.O. Smith 100277940 Board 321702-401 This factory-authorized part ensures directThe Lochinvar & A. O. Smith 100277940 Board is a critical low voltage connection board engineered for precision signaling in high efficiency heating systems. Specifically designed for the Knight KH055 285 fire tube boilers, this OEM replacement part serves as the central communication interface between the main controller and auxiliary system components. As a veteran technician knows, maintaining signal integrity in commercial water heating