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Moving to a 2-pole contactor allows for breaking both legs of the power supply
Enhanced Protection: Features a factory-installed 4 Amp manual reset breaker to protect downstream components from shorts and thermal overloads
replacing the entire assembly is often the standard practice to ensure long-term reliability and compliance with original equipment manufacturer specifications
Airtight Performance: High-temperature material prevents flue gas leakage and ensures consistent draft inducer operation
Duty-Cycle Durability: Engineered for 460V single phase systems
Lochinvar & A.O. Smith 100074640 Ignitor 319825-402 Moving to a 2-pole contactorThe Lochinvar & A. O. Smith 100074640 Ignitor is a critical genuine OEM ignition component engineered for high efficiency condensing water heaters and commercial boiler systems. Built to survive the rigorous thermal cycling of modern hydronic equipment, this black box ignitor assembly provides the high voltage spark necessary for consistent burner ignition and reliable system startup. As a standard replacement for Lochinvar Knight boilers and A. O.
