The Lochinvar & A.O. Smith 100165924 Ignitor is a critical combustion component engineered for high-output gas-fired heating systems. Specifically designed for compatibility with the Lochinvar Crest series (FBN2500–FBN3500) and FTXL models (FTX400–850), this ignitor ensures rapid heat-up and stable flame initiation in commercial boiler parts applications. Also known by the PLT30004 cross-reference, this 1/2" NPT assembly is a direct replacement for 100269563 and is essential for resolving boiler ignition failure and intermittent flame-sensing lockouts. The elliptical design facilitates consistent arc placement across the burner surface, promoting efficient ignition even in high-demand hydronic environments. Each kit includes a high-temperature ignitor gasket to maintain a pressure-tight seal, preventing flue gas leakage and preserving the integrity of the combustion chamber. For field technicians, verifying the spark gap and ensuring clean air intake in A.O. Smith water heaters is vital for maximizing the lifespan of this OEM replacement ignitor. Key Benefits Precise Compatibility: Direct OEM replacement part for Lochinvar Crest and FTXL series boilers, ensuring a perfect mechanical and electrical fit without modification. Durable Construction: Built with high-grade ceramic insulation and robust heating elements to withstand the extreme thermal cycling of commercial heating systems. Complete Seal: Includes the necessary replacement gasket to verify airtight installation and prevent hazardous exhaust recirculation. Versatile Application: Functions as an identical replacement for the PLT30004, streamlining inventory for service contractors managing multiple brands. Common Questions What boiler models use the 100165924 ignitor? This part is predominantly found in Lochinvar Crest (FBN2500, FBN3000, FBN3500) and FTXL (FTX400 through FTX850) models, as well as select A.O. Smith high-efficiency units. How do I know if my 100165924 ignitor needs replacement? Common indicators include repeated "Flame Fail Ignition" lockout codes, visible cracks or carbon fouling on the ceramic insulator, or a significant drop in microamp signals during the combustion cycle. Is the gasket included with the ignitor? Yes, this 100165924 kit is supplied with the required high-temperature gasket to ensure a safe, leak-free installation upon replacement. 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.
