Lochinvar & A.O. Smith 100109948 Ignitor

The Lochinvar & A.O. Smith 100109948 Ignitor is a high-performance silicon carbide hot surface ignitor engineered specifically for precision ignition in residential and commercial heating systems. This 120V HSI replacement serves as the direct updated version for the legacy 768A-211 model, ensuring reliable flame sensing and consistent ignition cycles under high-demand conditions. Designed to meet the exact specifications of original equipment manufacturers, this hot surface ignitor features robust ceramic insulation and high-temperature lead wires to prevent dielectric failure. When troubleshooting a furnace not igniting or a boiler system lockout, replacing a cracked or carbon-fouled element with the 100109948 ignitor kit restores peak combustion efficiency and prevents nuisance service calls. This part is essential for maintaining the operational integrity of A.O. Smith water heaters and Lochinvar boilers.

Key Benefits:

• Direct 768A-211 replacement ensuring seamless mechanical and electrical compatibility without field modification.
• Advanced silicon carbide construction provides rapid heat-up times and high resistance to oxidation.
• Compatible with a wide range of Lochinvar and A.O. Smith appliances for versatile inventory management.
• High-temperature ceramic potting protects internal connections from moisture and thermal stress.
• Optimized lead wire length and connector style for fast installation in tight burner compartments.

Common Questions:

Does this ignitor replace the older White-Rodgers 768A series?
Yes, the 100109948 is the official updated service part designed to replace the 768A-211 and equivalent legacy ignitors used in Lochinvar and A.O. Smith equipment.

What causes this ignitor to fail prematurely?
Most failures result from carbon buildup, physical fractures during handling, or improper voltage regulation. Never touch the ignitor element with bare hands, as skin oils create hot spots that lead to cracking.

Can I use this for troubleshooting a furnace that won’t glow?
If your control board is sending 120V to the ignitor leads but the hot surface ignitor fails to glow, the element is likely open. Testing for continuity with a multimeter will confirm if the 100109948 is the necessary fix.

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.