Lochinvar & A.O. Smith 100165929 Ignitor

The Lochinvar & A.O. Smith 100165929 Ignitor is a critical genuine OEM replacement component engineered for high-performance ignition cycles in residential and commercial boilers and water heaters. Also identified by the cross-reference PLT3021, this assembly features a premium ceramic insulator and a high-temperature silicon nitride ignitor element designed to withstand rapid thermal cycling without premature failure. The 100165929 ignitor with gasket provides a drop-in solution for service technicians, ensuring a gas-tight seal at the mounting flange to prevent combustion leaks and maintain pressure switch integrity. This hot surface ignitor (HSI) is factory-calibrated to provide consistent milliamp draw for flame rectification circuits within Lochinvar and A.O. Smith burner modules. Using genuine Lochinvar boiler parts ensures field reliability and maintains the equipment's original engineering specifications, preventing the common connectivity and voltage mismatch issues associated with universal aftermarket alternatives.

• Direct OEM Replacement: Replaces part number 100165929 and PLT3021 with perfect dimensional fit for high-efficiency burners.
• Complete Installation Kit: Includes the essential replacement ignitor gasket to ensure a proper seal against the combustion chamber.
• High Thermal Stability: Constructed to handle the extreme operating conditions of commercial-grade heating systems.
• Optimized Ignition Signal: Engineered to provide the exact resistance required for proper flame sensor feedback to the control board.

Is the 100165929 compatible with my unit?
This ignitor is specifically designed for various Lochinvar and A.O. Smith models; checking your manual for Lochinvar 100165929 or 100-165-929 is the most accurate way to verify fitment.

Does this ignitor include a new gasket?
Yes, this assembly comes with the factory-specified gasket, which is required whenever the ignitor is removed to prevent hazardous gas or combustion leaks.

What are the signs of a failing hot surface ignitor?
Common indicators include no-glow during the ignition sequence, visible cracks on the silicon element, or fault codes on the control board related to "Ignition Failure" or "Loss of Flame."

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.