Lennox Flame Sensor for Gas Furnaces

The Lennox flame sensor (also called a flame rod or flame probe) is a replacement furnace part designed for Lennox gas furnaces. It confirms that the burner flame is lit after ignition. If the sensor does not detect a flame, the furnace control board shuts off the gas valve. This safety function keeps unburned gas from building up in the heat exchanger.

Key Features:

• Detects the burner flame and sends a signal to the furnace control board
• Acts as a safety device by shutting off the gas supply if no flame is sensed
• Rod-style metal probe designed to hold up to the heat of the burner area
• Replaces worn, corroded or carbon-fouled sensors that cause short cycling or lockouts
• Available in multiple part numbers to match different Lennox furnace models

A failing flame sensor is a common cause of furnaces that light and then shut off after a few seconds. Replacing it restores reliable operation and protects the furnace. Choose the specific part number that matches your furnace.