Lochinvar & A.O. Smith 100110517 Electrode

The Lochinvar & A.O. Smith 100110517 Electrode is a critical ignition and flame sensing component engineered for high-efficiency condensing boilers and water heaters. This genuine OEM part, formerly identified as Lochinvar FIL2419, ensures precise spark ignition and reliable flame rectification within the combustion chamber. Designed for compatibility with Lochinvar Knight (KBN, KBN, WHN) and Armor (AWN) series, as well as several A.O. Smith Cyclone models, this electrode features a high-grade ceramic insulator and a durable metal probe capable of withstanding extreme thermal cycling. In the field, a fouled or cracked electrode often leads to ignition failure or "no flame detected" lockout codes. Replacing a worn spark igniter with this factory-spec component restores optimal burner sequencing and prevents nuisance diagnostic calls. This direct spark ignition electrode is essential for maintaining the narrow ionization current windows required by modern integrated control boards in commercial and residential hydronic systems.

• Direct OEM replacement for Lochinvar FIL2419 and A.O. Smith 100110517 ensuring exact physical fit and electrical continuity.
• Optimized for flame sensing and ignition, reducing startup delays and lockout errors in high-efficiency systems.
• High-temperature ceramic body provides superior dielectric strength to prevent voltage leakage and grounding issues.
• Precision-engineered probe gap maintains consistent arc intensity for reliable combustion across various gas pressures.
• Compatible with a wide range of Lochinvar Knight XL, Armor, and Cyclone commercial water heater models.

What causes this electrode to fail in Knight or Armor boilers?
Failure is typically caused by carbon buildup (sooting) on the probe or microscopic cracks in the ceramic insulator due to thermal stress, which allows the spark to arc to the chassis instead of the burner. Regular inspection during annual maintenance is recommended.

Does this part include the mounting gasket?
This specific part number focuses on the electrode assembly. For a proper pressure seal on condensing units, it is best practice to inspect the mounting gasket and replace it if it shows signs of compression set or heat degradation.

Can I clean the 100110517 electrode instead of replacing it?
While light oxidation can sometimes be removed with a non-conductive abrasive pad, any damage to the ceramic or significant metal erosion requires a full replacement to ensure the flame signal remains within the microamp parameters required by the control board.

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.