Lennox 28G36 Flame Sensor/Electrode

The Lennox 28G36 Flame Sensor/Electrode is a precision-engineered OEM replacement part designed for high-performance gas-fired systems. This critical flame rectification component ensures the safety and efficiency of the combustion cycle by detecting the presence of a burner flame and signaling the control board to sustain the gas valve opening. As a veteran-grade furnace flame sensor, it is functionally identical to Lennox 28G3601 and serves as a direct cross-reference for multiple Allied, Armstrong, and Ducane part numbers, including PSE-LN1 and R43800-001. Built with a durable probe and a secure ignition electrode mounting bracket, this sensor is designed to withstand the high-temperature environment of a furnace burner assembly. For technicians troubleshooting intermittent lockout or ignition failure, replacing a fouled or oxidized sensor with this genuine Lennox part restores reliable signal voltage and prevents unnecessary system shutdowns. Its 90-degree bend and standard 1.718-inch electrode length ensure precise alignment within the flame path for optimal microamp signal strength.

• Universal Compatibility: Interchanges seamlessly with 28G3601, PSE-LN1, and old R43800-001 part numbers across Lennox, Armstrong, and Ducane units.
• Reliable Flame Detection: Maintains a consistent microamp signal to the ignition control board, preventing nuisance safety lockouts.
• OEM Durability: Engineered for extreme heat resistance to resist carbon buildup and oxidation longer than aftermarket alternatives.
• Direct Fit: Features a standardized mounting bracket for rapid installation in existing burner manifolds.

Is the Lennox 28G36 interchangeable with the 28G3601?
Yes, the 28G36 is the direct replacement and is technically identical to the 28G3601 and PSE-LN1 models.

What are the symptoms of a failing flame sensor?
The most common indicator is the furnace burner lighting for only 2-5 seconds before shutting off, often caused by a low signal from the Lennox flame electrode.

Can I clean the 28G36 sensor instead of replacing it?
While light cleaning with an abrasive pad can temporarily restore function, significant oxidation or ceramic cracking requires a new flame sensor to ensure consistent system safety and performance.

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.