Lochinvar & A.O. Smith 100109221 Piezo Ignitor

The Lochinvar & A.O. Smith 100109221 Piezo Ignitor with Bracket Assembly is the direct OEM replacement ignitor for residential and commercial water heaters. This high-performance component is the updated version for 9003410115, engineered to provide a consistent high-voltage spark for gas burner ignition. Designed for Lochinvar and A.O. Smith water heater repair, it includes the integral mounting bracket assembly to ensure proper electrode alignment and gap spacing. Professional-grade construction prevents dielectric breakdown in high-heat environments, restoring pilot light ignition and system reliability. Whether servicing a standard atmospheric vent unit or a specialized commercial boiler, this manual piezoelectric ignitor meets precise factory specifications for voltage output and mechanical cycling. By replacing a fouled or cracked electrode with this genuine 100109221 ignitor assembly, technicians can eliminate intermittent ignition failures and ensure safe combustion sequences in HVACR heating systems.

Key Benefits

• OEM Compatibility: Direct replacement for part number 100109221 and supersedes 9003410115 for a perfect fit.
• Integrated Bracket: Factory-mounted bracket assembly ensures precise spark positioning relative to the burner ports.
• Technician-Ready: Simplifies water heater maintenance by providing a complete bolt-on solution for failed ignition circuits.
• Reliable Spark: Engineered to deliver a hot, consistent spark to initiate gas burner ignition under varying draft conditions.

Common Questions

Is this the correct replacement for the 9003410115 ignitor?
Yes, the 100109221 is the official manufacturer-designated updated version for 9003410115 and is fully backwards compatible with existing Lochinvar and A.O. Smith mounting patterns.

Can I use this for both residential and commercial water heaters?
This piezo ignitor is common across various platforms including Promax and high-efficiency models. Always verify your specific Lochinvar or A.O. Smith model number for exact replacement part compatibility.

Does this unit require a battery or external power?
No, this is a manual piezo ignitor that generates a spark through mechanical pressure, making it an ideal OEM component for systems requiring a manual pilot start-up.

California Proposition 65 Warning: This product may expose you to chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.

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.