Description
The Lennox 15K16 Flame Sensor-ULN is an OEM-quality replacement flame sensor engineered for use in compatible Lennox heating systems. Flame sensors play a critical role in furnace safety — they detect the presence of a burner flame and send a signal to the control board to confirm ignition. If the sensor fails to detect a flame, the control board will shut off the gas valve to prevent unburned gas from accumulating, protecting both the equipment and the occupants of the building.
Key Features
- OEM Lennox replacement part — SKU 15K16
- Designed for direct, drop-in replacement in compatible Lennox furnace models
- Ensures accurate flame detection for safe and reliable furnace operation
- Helps prevent nuisance lockouts caused by a worn or contaminated sensor rod
- ULN (Ultra-Low NOx) compatible design
- Maintains proper communication with the furnace control board
Why Replace Your Flame Sensor?
Over time, flame sensor rods accumulate oxidation and residue that insulate the rod and reduce its ability to conduct the microamp signal needed to confirm flame presence. A degraded sensor can cause repeated ignition lockouts, short cycling, or a furnace that lights briefly and then shuts off. Replacing the sensor with a genuine Lennox 15K16 restores proper operation and extends the life of the overall heating system.
Application
- Compatible with select Lennox gas furnace models — consult your equipment documentation or contact Jackson Systems to confirm fitment
- Suitable for residential and light commercial Lennox heating applications
Installation Notes
- Always shut off power and gas supply before servicing
- Handle sensor rod carefully — avoid touching the rod with bare hands to prevent contamination
- Consult the furnace service manual for proper torque and wiring specifications
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