Lochinvar & A.O. Smith 100109976 Control Board 319847-401 technicians often use a 2-pole

technicians often use a 2-pole contactor as an upgrade for a 1-pole unit

Engineered for durability in demanding HVAC combustion blower assemblies

50-inch bore to seat securely on standard motor shafts

Enhanced System Reliability: Prevents coil icing and potential compressor damage associated with faulty defrost sensors

Constructed with a high-strength aluminum die-cast housing

Lochinvar & A.O. Smith 100109976 Control Board 319847-401 technicians often use a 2-poleThe Lochinvar & A. O. Smith 100109976 Control Board is a critical integrated electronic control module designed for high efficiency boilers and commercial water heaters. This OEM replacement part acts as the central microprocessor, managing ignition sequences, flame proving, and safety limit monitoring. It is a direct successor to the AO Smith 9004600205, ensuring backward compatibility with legacy systems. The addition of the cable assembly harness