Lennox 13H27 Electrode/Sensor

The Lennox 13H27 Electrode/Sensor is a critical OEM flame sensor replacement designed for high-performance monitoring in residential and commercial heating cycles. This component is identical to part number 13H2701, providing a direct-fit solution for technicians servicing Lennox GCS16 and GCS20 series units. Constructed with a high-grade stainless steel electrode and lead oxide insulation, it effectively detects flame ionization to ensure the ignition module maintains gas flow safely. If your burner is cycling off prematurely or failing to stay lit after the initial ignition sequence, a fouled or cracked Lennox 13H27 sensor is often the primary failure point. This HVAC flame sensor is engineered to withstand the intense thermal stress of the combustion chamber, preventing nuisance furnace ignition failures and ensuring the system operates at peak thermal efficiency. As a genuine Lennox replacement part, it maintains the precise millivolt signal required by the control board for reliable safety lockouts.

• Precise Flame Detection: Optimizes burner performance by providing accurate ionization feedback to the ignition controller.
• Universal Compatibility: Serves as a direct replacement for legacy part 13H2701 and integrates seamlessly with various Lennox HVAC equipment.
• Durable Construction: Features a robust stainless steel probe designed for extended exposure to high-temperature combustion environments.
• Safety Compliance: Vital for preventing hazardous gas buildup by ensuring the fuel valve closes if no flame is detected.

Is the 13H27 interchangeable with the 13H2701?
Yes, these parts are identical in form, fit, and technical specification. You can use either part number for your repair without modifications.

What are the symptoms of a failing flame sensor?
The most common indicators include the burner extinguishing immediately after ignition, frequent system lockouts, or visible carbon buildup and oxidation on the stainless steel probe.

Can I clean this electrode instead of replacing it?
While light oxidation can sometimes be removed with a fine abrasive, any cracks in the ceramic insulator or deep pitting on the sensor rod require a full Lennox 13H27 replacement to ensure reliable operation.

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.