Pay in 4 interest-free payments of $34.69 Learn more
Ships within 48 hours · Estimated delivery Sep 17 - Sep 22
4 inches WC
For technicians performing a gas burner transformer replacement
Replacing fouled or corroded furnace burner tubes with this factory-authorized part restores system efficiency and promotes appliance longevity
technicians often use a 2-pole contactor as an upgrade for a 1-pole unit
Lochinvar & A.O. Smith 100109976 Control Board 319847-401 4 inches WCThe 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