Supco FLS51M14 Furnace Flame Sensor, 2.5" Flange to Tip

The Supco FLS51M14 is a direct replacement flame sensor designed for residential and light commercial gas furnaces. This essential HVAC safety component monitors the presence of flame in the burner assembly, ensuring proper ignition and safe operation of your heating system.

Key Features:

• 2.5-inch measurement from mounting flange to sensor tip for precise fitment
• High-quality stainless steel sensor rod resists corrosion and extends service life
• Standard mounting bracket design for easy installation
• Detects flame presence to prevent dangerous gas buildup
• Direct replacement for worn or failed OEM flame sensors

Flame sensors are critical safety devices that conduct electrical current when heated by the furnace flame. When the sensor detects no flame, it signals the gas valve to close, preventing unburned gas from accumulating in the combustion chamber. Regular replacement of flame sensors helps maintain furnace efficiency and prevents costly service calls.