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The A.O. SMITH 100301928 is a straight spark igniter assembly kit designed for use in Vertex-100 water heaters. The igniter assembly initiates combustion by generating a high-voltage spark at the burner, allowing the water heater to light and maintain the heating cycle. This is an OEM-style replacement component intended for installation by licensed plumbers or qualified water heater service technicians. The straight configuration matches the original igniter geometry, ensuring proper electrode positioning and reliable ignition performance in compatible units.
This igniter assembly kit is used in residential water heater service applications, specifically within the A.O. SMITH Vertex-100 product line. It is a direct-replacement part suited for routine maintenance, ignition failure diagnosis, and component-level repair of gas-fired Vertex-100 water heaters. Service technicians replacing a failed or degraded igniter will find this kit provides the correct assembly in a straight form factor for the intended installation position.
Designed as a direct OEM-style replacement for the A.O. SMITH Vertex-100 water heater series.
Installation should be performed by a licensed plumber or qualified water heater service technician. Before servicing, shut off the gas supply and disconnect electrical power to the water heater. Handle the igniter electrode carefully to avoid damage to the ceramic insulator, which can cause ignition failure. Work should conform to applicable local plumbing and gas codes, including IFGC guidelines where adopted.
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