Lochinvar & A.O. Smith 100110355 Ignitor/Flame Sensor

The Lochinvar & A.O. Smith 100110355 Ignitor/Flame Sensor is a critical hot surface ignition component engineered for high-efficiency commercial water heaters and boilers. This dual-purpose electrode serves as both the ignition source and the flame rectification sensor, ensuring precise burner sequencing. Designed for compatibility with several high-output series, including Lochinvar Knight and A.O. Smith Cyclone models, this 100110355 ignitor replacement features high-grade ceramic insulation to prevent electrical leakage and a durable element capable of withstanding extreme thermal cycling. In the field, technicians rely on this part for its consistent resistance values and rapid heat-up times, which are essential for maintaining HVAC flame rectification signal strength. Properly installing this OEM water heater ignitor ensures the burner controller receives the required microamp signal to maintain the gas valve circuit, preventing nuisance lockouts and ensuring optimal combustion performance in demanding commercial applications.

• Dual-Function Design: Integrates ignition and flame sensing into a single assembly to streamline commercial boiler repair.
• Broad Compatibility: Direct replacement for A.O. Smith part 100110355 and various Lochinvar configurations.
• Precision Engineering: High-temperature lead wires and specialized connectors ensure a secure, vibration-resistant fit.
• Operational Reliability: Minimizes burner startup failures by providing a consistent hot surface ignition point.

What causes a weak flame signal with this sensor?
Carbon buildup or oxidation on the probe surface can insulate the rod, preventing the rectification of the AC voltage into the DC microamp signal required by the control board.

Is this a direct fit for Lochinvar Knight boilers?
Yes, it is the specified OEM component for multiple Knight iterations where the 100110355 flame sensor is utilized for ignition control.

Can I test this ignitor with a multimeter?
Technicians should check for continuity across the element and verify the microamp output during the burn cycle to ensure it meets the manufacturer’s minimum threshold for the specific gas valve controller.

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.