Lochinvar & A.O. Smith 100297134 Flame Sensor

The Lochinvar & A.O. Smith 100297134 Flame Sensor is a critical genuine OEM replacement part engineered for precision flame rectification in high-efficiency gas-fired systems. Designed for use in Lochinvar boilers and A.O. Smith water heaters, this sensor monitors the burner flame to ensure the ignition control module receives a continuous microamp signal. If the flame signal is lost or carries high resistance, the system initiates a safety lockout to prevent the accumulation of unburned gas. This HVAC flame sensor replacement is built to withstand the extreme thermal cycling of commercial water heating equipment, providing reliable gas burner flame detection where aftermarket alternatives often fail due to improper ceramic insulation or rod alloys. When troubleshooting a water heater not staying lit or a lockout condition, verified OEM furnace parts like the 100297134 ensure the millivolt signal stays within manufacturer parameters, maintaining system uptime and safety compliance on the job site.

Technical Benefits:

• Direct Compatibility: Specifically engineered for Lochinvar and A.O. Smith gas-fired units, ensuring exact physical fit and electrical integration.
• Superior Signal Integrity: High-grade electrode material maximizes flame rectification accuracy, reducing service calls for nuisance lockouts.
• High-Temperature Durability: The ceramic insulator is designed to resist cracking and carbon fouling under intense thermal stress.
• Safety First: Meets genuine OEM standards for immediate response to flame failure, protecting the combustion chamber and heat exchanger.

Common Questions:

How do I know if my 100297134 flame sensor is bad?
If the burner ignites but shuts down after a few seconds, the sensor may be fouled or failed. Check for cracked porcelain or heavy oxidation on the rod. You can test for a microamp signal (typically 2 to 5 µA DC) while the burner is active using a multimeter.

Can I clean the flame sensor instead of replacing it?
While cleaning with a very fine abrasive pad can temporarily remove oxidation, it often removes the protective coating on the rod. For commercial boilers and water heaters, replacing the sensor with part 100297134 is the best practice to ensure long-term reliability and safety.

Is this part compatible with other brands?
This sensor is a genuine OEM replacement for specific Lochinvar and A.O. Smith models. Always cross-reference your specific appliance model number with the parts list to ensure this is the correct HVACR replacement part for your unit.

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.