Rheem-Ruud 62-23543-02 Flame Sensor

The Rheem-Ruud 62-23543-02 Flame Sensor is a critical safety component engineered for flame rectification in high-efficiency gas-fired systems. Designed with a 90-degree sensor offset and a 2-1/16 inch rod length from the mounting flange to the tip, this sensor provides precise flame detection to the integrated control board. Constructed from high-temperature resistant stainless steel and a rugged ceramic insulator, it is built to withstand the constant thermal stress of the burner assembly. When the furnace flame sensor detects the microamp signal generated by the burners, it confirms ignition; if the signal is lost or falls below the threshold, the system triggers a safety lockout to prevent unburned gas accumulation. This OEM replacement part features a standard 1/4 inch male quick connect terminal for seamless integration into existing Rheem, Ruud, and WeatherKing wiring harnesses, ensuring reliable HVAC troubleshooting and long-term system performance.

• Precise Rectification: Reliably converts AC voltage to the DC microamp signal required by the control board to verify igniter success.
• Durable Construction: The stainless steel rod resists oxidation and carbon buildup, extending service life in demanding combustion environments.
• Direct OEM Fit: Features a pre-formed 90-degree bend and standard bracket mounting for exact alignment in the burner flame path.
• Enhanced Safety: Acts as the primary fail-safe to prevent gas valve operation during ignition failure or combustion disruption.

What are the symptoms of a failing flame sensor?
The most common indicators are the furnace lighting for 2–5 seconds and then shutting down, frequent short cycling, or the control board flashing a "No Flame Detected" error code.

Can I clean the 62-23543-02 instead of replacing it?
While cleaning with light-grit sandpaper or a soft cloth can temporarily remove carbon soot, ceramic insulator cracks or internal resistance in the rod require a full replacement to ensure consistent signal strength.

Will this sensor work on other furnace brands?
This specific 90-degree flame sensor is designed for Rheem and Ruud platforms. Always verify the offset angle and rod length against your specific model's technical data before installation.

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.