Lochinvar & A.O. Smith 100109859 Ignitor 321894-708 technicians should verify the condition

technicians should verify the condition of existing 24V wiring and connectors

This modulating temperature controller eliminates the offset common in proportional-only systems

making it suitable for standard commercial building pressure requirements and medium-duty industrial loops

or the furnace short-cycling during the startup sequence

Lochinvar & A.O. Smith 100109859 Ignitor 321894-708 technicians should verify the conditionThe Lochinvar & A. O. Smith 100109859 Ignitor is a high performance silicon carbide hot surface ignitor engineered specifically for technical compatibility with premium Lochinvar Knight and A. O. Smith water heaters. As a critical OEM replacement part, it ensures rapid thermal response to bridge the gap between the call for heat and burner ignition, maintaining the tight combustion tolerances required by high efficiency condensing boilers. This