OEM Lennox Ignitor & Flame Sensor Assembly — 62K50

The Lennox 62K50 ignitor and flame sensor assembly handles the two most important steps of every heating cycle: lighting the burners and confirming that a flame is actually present. The hot surface ignitor glows and ignites the gas, while the integrated flame sensor generates a small microamp signal that tells the control board the burners lit successfully. Without a valid flame signal, the board shuts the gas valve to keep your home safe. This genuine OEM assembly is a direct fit for compatible Lennox furnaces.

Common failure symptoms include a furnace that clicks but never ignites, burners that light and then go out after a few seconds (a false flame-sense reading), repeated ignition lockouts, no heat on call, and a visibly cracked or worn ignitor element. Flame sensors also fail when the rod becomes coated with oxidation.

Why OEM matters: Ignition timing and flame-sense sensitivity are tuned to your specific Lennox control board. A genuine 62K50 ensures the ignitor reaches the correct temperature on schedule and the flame sensor produces the microamp reading the board expects — eliminating the nuisance lockouts and short-cycling common with generic parts. Installing the OEM assembly restores dependable, safe ignition exactly as Lennox engineered it.