Lennox 90H83 Flame Sensor for Gas Furnaces

The Lennox 90H83 is a genuine OEM flame sensor designed for select Lennox gas furnaces. This critical safety component monitors the presence of a flame during the combustion process, ensuring your furnace operates safely and efficiently.

Key Features:

• Genuine Lennox OEM replacement part (T6-2092)
• Detects flame presence and prevents dangerous gas leaks
• Metal rod construction designed for high-temperature operation
• Works with electronic ignition systems
• Prevents carbon monoxide buildup and potential explosions
• Replaces part numbers 90H8301, T6-2092, and R39073B001

The flame sensor is positioned in the burner assembly where it generates a small electrical current when heated by the burner flame. This current signals the furnace control board to keep the gas valve open. If no flame is detected, the sensor automatically shuts off the gas supply within seconds, providing essential protection against hazardous gas accumulation. Regular maintenance and replacement of a dirty or faulty flame sensor ensures reliable furnace operation and prevents short cycling issues.