Lochinvar & A.O. Smith 100074237 Ignitor

The Lochinvar & A.O. Smith 100074237 Ignitor is a critical OEM replacement component designed for high-efficiency gas-fired water heaters. Engineered for precision and thermal durability, this ignitor provides the essential spark required for consistent burner ignition in residential tankless natural gas water heaters. As a veteran technician knows, maintaining the ignition sequence at peak performance is vital for system reliability and preventing "no-heat" service calls. This specific part is a direct replacement for various A.O. Smith, Lochinvar, and Takagi models, ensuring that the flame signal and startup timing remain within factory specifications. Using a genuine OEM igniter like the 100074237 ensures the resistance levels match the control board's requirements, reducing the risk of premature failure or ignition lockout errors in complex hydronic and potable water systems.

• OEM Compatibility: Precision-engineered for a seamless fit in A.O. Smith GTS/ATI/GT and Lochinvar tankless units.
• Reliable Ignition: Provides a consistent hot surface or spark discharge to ensure smooth burner transitions and prevent gas buildup during startup.
• High-Temperature Durability: Constructed with industrial-grade materials to withstand the intense thermal cycling found in high-efficiency HVACR applications.
• System Protection: Helps eliminate nuisance flame failure codes by maintaining the correct electrical resistance for the ignition control module.

• Is this 100074237 ignitor a direct swap for my Takagi unit? Yes, this part replaces equivalent numbers in various Takagi T-KJR, T-K3, and T-M32 series models. Always verify your specific model and serial number before installation.
• Why is my burner failing to ignite even with a new ignitor? While a new 100074237 addresses the source of the spark/heat, you should also inspect the flame sensor, gas valve manifold pressure, and ensure there is no carbon buildup on the burner assembly.
• Does this include the required gasket? Many 100074237 assemblies come as a standalone component; it is recommended to check the condition of your existing ignitor gasket and replace it if it shows signs of hardening or 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.