Ensure dependable furnace operation with the Lennox 20J91 Flame Sensor, a genuine OEM replacement designed to deliver consistent flame detection in your heating system. This critical safety component monitors the burner flame and helps prevent unsafe gas accumulation by signaling the control board to shut off the gas valve if no flame is detected.

Built for compatibility with select Lennox furnaces, the 20J91 flame sensor offers straightforward installation and reliable performance. Whether you're performing routine maintenance or replacing a faulty sensor, this part helps restore safe and efficient furnace function.

Key Features:

OEM Lennox flame sensor for assured fit and function

Detects burner flame and communicates with the ignition system

Promotes safe and energy-efficient furnace operation

Easy to install and maintain

Ideal for HVAC technicians and homeowners, the Lennox 20J91 Flame Sensor helps keep your heating system running safely and efficiently.

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