Lochinvar & A.O. Smith 100110795 Ignitor

As a seasoned technician, you know that a cracked or fouled hot surface ignitor is one of the most common points of failure in high-efficiency residential water heaters. The Lochinvar & A.O. Smith 100110795 Ignitor is a critical OEM replacement part engineered specifically for hot surface ignition (HSI) systems. This silicon nitride ignitor serves as a direct 9005989205 replacement, ensuring precise timing and high-temperature performance required to light the main burner reliably under various manifold pressures. Unlike aftermarket alternatives that often suffer from premature resistance drift, this genuine A.O. Smith ignitor maintains consistent amperage draw to avoid nuisance lockout codes or "no hot water" service calls. Designed for compatibility with select Lochinvar, A.O. Smith, State, and American water heater models, it features a plug-and-play connector for secure integration with the Intellivent gas control or standard ignition module. When you're dealing with a heater that won't cycle or shows signs of carbon buildup on the element, swapping in the 100110795 is the industry-standard fix to restore system sequence of operation.

• Precise Compatibility: Direct OEM part for 100110795 and 9005989205, eliminating fitment issues during emergency repairs.
• Durable Construction: Built to withstand the rapid thermal cycling inherent in high-recovery residential units.
• Reduced Callbacks: Reliable burner ignition prevents intermittent ignition failures and the diagnostic flash codes associated with weak ignitors.
• Factory Precision: Ensures the gas valve opens only when the ignitor has reached the correct temperature, protecting the system's combustion integrity.

• What are the symptoms of a failing 100110795 ignitor? Typically, the blower will run, but the burner fails to ignite. You may see a "low flame signal" or "ignition failure" status light on the control valve.
• Is this compatible with multiple brands? Yes, this unit is the standard HSI replacement for many A.O. Smith, Lochinvar, State, and Reliance power-vented models.
• Can I touch the ignitor element? No. As with all hot surface ignitors, skin oils can cause hot spots and lead to immediate failure of the silicon nitride material. Always handle by the ceramic base.

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.