Armstrong Furnace R38492B001 Flame Sensor

The Armstrong Furnace R38492B001 Flame Sensor is a critical OEM replacement part engineered for high-accuracy flame rectification in residential and light commercial gas-fired systems. Designed to withstand the rigorous thermal cycles of a combustion chamber, this furnace flame sensor rod utilizes flame ionization technology to signal the control board, ensuring the gas valve remains open only when a stable pilot or burner flame is proved. For any veteran technician, we know that a dirty flame sensor is the primary culprit behind furnace short cycling and ignition lockout codes. This Armstrong R38492B001 features a high-temperature resistant metal rod and a durable ceramic insulator, providing the reliable microamp signal required to prevent nuisance shutdowns. If you are troubleshooting a furnace not heating or encountering a frequent flame loss error, replacing the old, oxidized sensor with this genuine HVAC flame detector is the most effective way to restore system timing and prevent hazardous gas buildup. Compatible with select Armstrong Air, Lennox, and Ducane equipment, it is built for long-term flame sensing performance in demanding environments.

• Direct OEM Compatibility: Precise fit for Armstrong Air, Lennox, and Ducane gas furnaces, eliminating field modifications.
• Reduced Service Callbacks: High-grade flame rectification rod ensures a consistent microamp signal to the integrated furnace control.
• Enhanced Safety: Rapidly detects flame failure to trigger immediate fuel shutoff, preventing gas accumulation.
• Durable Construction: Engineered with aerospace-grade ceramic and heat-resistant alloys to resist soot and carbon buildup.
• Easy Installation: Standard single-screw mounting and lead terminal for fast "drop-in" replacement during furnace maintenance.

How do I know if my Armstrong R38492B001 flame sensor is bad?
If the burners ignite but shut off after approximately 4 to 7 seconds, the sensor is likely failing to send the flame rectification signal. Check for a microamp reading between 1.5 and 5.0 ?A; anything lower usually indicates a dirty flame sensor or structural failure.

Can I clean this sensor instead of replacing it?
While cleaning with a very fine abrasive pad can provide a temporary fix for carbon buildup, oxidation eventually degrades the metal rod's conductive properties. For 100% reliability in the field, we recommend replacing the flame sensor rod to avoid repeated no-heat calls.

Will this part fix my furnace's ignition lockout error?
A lockout code specifically indicating "Flame Not Sensed" is often resolved by this part. However, ensure your furnace burner assembly is properly grounded, as flame sensing depends on a complete electrical circuit through the flame to ground.

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.