Lennox 28M97 Furnace Flame Sensor 2 Inch

The Lennox 28M97 is a genuine OEM flame sensor designed for Lennox gas furnaces. This critical safety component detects the presence of flame during the ignition sequence, allowing the furnace to operate safely and efficiently.

Key Features:

• Genuine Lennox OEM replacement part
• 2-inch sensor probe length for accurate flame detection
• Direct replacement for part numbers 28M97, 20467102, and AST28M97
• Essential safety component that prevents gas valve operation without flame present
• Designed for reliable performance in residential and commercial Lennox furnace systems

The flame sensor works by detecting the electrical current generated when flame is present. If the sensor fails to detect flame, the furnace control board will shut down the gas valve to prevent dangerous gas buildup. Regular replacement of worn or corroded flame sensors helps maintain safe, reliable furnace operation and prevents nuisance shutdowns.

Cross-Reference Part Numbers: 20467102, AST28M97