9004566105 Lochinvar / A.O. Smith Hot Surface Ignitor 100109941

Normal stock Item 

Replaces 194057 

Lochinvar & A.O. Smith Hot Surface Ignitor 100109941

The 100109941 Lochinvar & A.O. Smith Hot Surface Ignitor is the OEM ignition source used in a wide range of residential and commercial water heaters. Engineered for fast, reliable ignition, this silicon‑carbide ignitor provides consistent heat output and dependable performance under high‑temperature operating conditions.

A failing ignitor can cause intermittent burner operation, delayed ignition, or complete no‑heat conditions. Replacing it with the genuine 100109941 ensures proper fit, safe ignition, and long‑term reliability. Ideal for technicians servicing Lochinvar, A.O. Smith, State, and other partner‑brand water heater platforms that use this OEM ignition assembly.