always verify the linkage setup during installation to ensure the correct "normal" position

or visible cracks in the burner tube

a pilot that sparks but fails to light the main burner

Enhanced System Safety: Monitors flame sensing and blower timing to prevent overheating and hazardous gas accumulation

Lochinvar & A.O. Smith 100110588 Flow Switch 318172-701 always verify the linkage setupThe Lochinvar & A. O. Smith 100110588 Flow Switch is a critical safety and monitoring component engineered for high efficiency hydronic systems. As an OEM replacement flow switch, this paddle style device is designed to detect the presence or absence of fluid movement, providing essential feedback to the appliance control board. It serves as a direct replacement for obsolete part numbers, including the A. O. Smith 9005680205, ensuring seamless