Lochinvar & A.O. Smith 100165919 Ignitor

Upgrade your ignition system with the Lochinvar & A.O. Smith 100165919 Ignitor, a high-performance Hot Surface Ignitor (HSI) designed for precision and durability in demanding heating applications. This authentic OEM component is a direct replacement for the Lochinvar PLT3000 and the older PLT2000 models, ensuring seamless mechanical and electrical compatibility. Built to withstand extreme thermal cycling, this Silicon Carbide ignitor features a robust integrated flame rod and wire harness to provide the control board with the reliable flame rectification signals necessary to prevent nuisance ignition failure lockouts. Field-tested for high-efficiency pool heaters and commercial boilers, this ignitor delivers a consistent spark for optimal gas burner combustion. Whether you are servicing a Lochinvar EnergyRite (ER) series or a compatible A.O. Smith water heater, utilizing this genuine Lochinvar replacement part maintains the factory-specified sequence of operation and safety standards required for professional HVACR maintenance.

• Direct PLT3000 Cross-Reference: Engineered as a drop-in replacement for 100165919 and PLT3000, eliminating field modifications.
• Integrated Flame Sensing: Features a dual-purpose design with a built-in flame rod for accurate millivolt signal feedback to the ignition module.
• High-Temperature Durability: Constructed with premium ceramic materials to resist oxidation and carbon buildup in high-heat environments.
• Broad Compatibility: Optimized for use in Lochinvar ER151 through ER401 pool heater models and various A.O. Smith commercial units.
• Plug-and-Play Installation: Includes the factory-terminated wiring harness for secure electrical connections and reduced diagnostic time.

Is the 100165919 compatible with the older PLT2000 ignitor?
Yes, the 100165919 is the current manufacturer-recommended replacement for the discontinued PLT2000 series, offering improved thermal resistance.

What causes this ignitor to crack or fail prematurely?
Most HSI failures result from handling the element with bare hands (oils creating hot spots) or improper combustion air mixtures leading to excessive soot accumulation.

Does this part include the mounting gasket?
This SKU typically includes the ignitor and harness assembly; we recommend inspecting your existing mounting gasket and replacing it if it shows signs of hardening or thermal degradation.

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.