Lochinvar & A.O. Smith 100109906 Ignitor

As a veteran tech, you know that a reliable light-off is the foundation of any high-efficiency system. The Lochinvar & A.O. Smith 100109906 Ignitor is a critical OEM replacement component designed to restore precise ignition in residential and commercial gas water heaters and boilers. This hot surface ignitor serves as the updated factory-authorized version for the legacy part number 9004519205. Engineered with a robust silicon nitride element, this component is built to withstand the intense thermal cycling of demanding HVACR environments. It provides the consistent, high-temperature glow required to ignite the burner assembly without the reliability issues of older standing pilot systems. Whether you are performing a routine service call or a critical emergency repair, using a genuine 100109906 ignitor ensures seamless compatibility with Lochinvar Knight boilers and A.O. Smith high-efficiency tanks, maintaining the manufacturer's specified combustion performance. This 0.72 lb. HVAC ignition part features a durable ceramic base and factory-terminated lead wires for a secure electrical connection to the ignition module, reducing the risk of nuisance "no-call-for-heat" codes on the job site.

• OEM Precision: Direct replacement for part number 9004519205, ensuring exact fitment and alignment within the burner assembly.
• Silicon Nitride Construction: Superior durability compared to silicon carbide, offering enhanced resistance to oxidation and mechanical shock.
• Optimized Performance: Facilitates rapid heat-up for efficient gas burner ignition and reduced startup lag.
• Broad Compatibility: Cross-referenced for use across multiple Lochinvar and A.O. Smith boiler and water heater series.
• Reduced Call-Backs: Reliable ignition cycles prevent common flame sensing and ignition failure error codes.

• What are the signs that this ignitor needs replacement? Typical symptoms include a "no spark" or "no glow" condition during the ignition sequence, burner failure accompanied by ignition error codes on the control valve, or visible cracks on the silicon nitride element.
• Is this compatible with older 9004519205 models? Yes, the 100109906 is the official updated version specifically designed to replace the 9004519205 in all compatible heating units.
• Does this require professional installation? For safety and performance, it is highly recommended that a licensed HVAC technician verify voltage and gas pressure during the installation of any boilers and water heater parts.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.