Lochinvar & A.O. Smith 100110707 Flame Sensor

The Lochinvar & A.O. Smith 100110707 Flame Sensor is a critical OEM safety component engineered for precise flame rectification in high-efficiency gas-fired boilers and commercial water heaters. As a veteran technician knows, a fouled or degraded flame rod is the primary culprit behind short cycling and ignition lockout (Error Code ignition failure). This genuine replacement flame sensor is designed to withstand the intense thermal environment of the burner chamber, providing a reliable microamp signal to the integrated furnace control (IFC) or ignition module. When the sensor detects a flame, it allows the gas valve to remain open; if the signal drops below the required threshold, it immediately terminates the gas supply to prevent hazardous buildup. This part is a direct replacement for various Lochinvar and A.O. Smith models, ensuring exact mechanical fitment and proper alignment within the pilot assembly or burner path.

• OEM Precision: Genuine 100110707 part ensures 100% compatibility with A.O. Smith and Lochinvar combustion systems without field modifications.
• Reliable Flame Sensing: High-grade ceramic insulator and durable metal rod provide consistent flame detection to minimize nuisance service calls.
• System Protection: Critical safety interface prevents unburned gas accumulation by maintaining strict combustion safety protocols.
• Direct Fit: Replaces worn or oxidized sensors to restore factory-spec microamp readings and efficient burner operation.

• What causes a flame sensor to fail? Most failures result from carbon buildup, oxidation, or a cracked ceramic insulator. While cleaning can provide a temporary fix, recurring furnace lockout usually indicates the flame sensor probe requires replacement to ensure signal integrity.
• How do I test the 100110707 sensor? Use a multimeter set to microamps (µA) in series with the sensor wire. Most Lochinvar and A.O. Smith systems require a steady signal (typically 2.0 to 5.0 µA) to keep the gas valve energized.
• Is this sensor compatible with my unit? This part is widely used in residential and commercial water heater parts and boiler components. Always verify the part number against your unit’s technical data sheet or wiring diagram before installation.

This item is not eligible for free shipping.

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.