Lochinvar & A.O. Smith 100110744 Switch 319847-401 This component is essential for

This component is essential for maintaining peak performance in compatible Burnham boiler parts after 2003 models

verify the part number in your unit's authorized parts manual or contact a technician

Smith 100097250 Flame Sensor

5 psi depending on the regulator body and diaphragm size

Lochinvar & A.O. Smith 100110744 Switch 319847-401 This component is essential forThe Lochinvar & A. O. Smith 100110744 Switch is a critical OEM replacement component designed for integrated power control within high efficiency residential and commercial water heating systems. This water heater power switch resides on the main control panel, providing a direct interface for technicians to verify circuit continuity and manage system states during troubleshooting or routine maintenance. Engineered as a genuine A. O. Smith replacement