• The most common reasons for replacing the flame sensor are when the furnace doesn’t heat or runs only for a few minutes.
• Flame sensor 69W43 is fit for Lennox/Ducane/Armstrong furnaces, including Lennox ML18UH EL180 ml180uh090p36b-55 and Duncane 80G1DF070AP12. Note: Confirm your original part number before you order.
• Flame Sensor Igniter High Quality - alumina ceramic insulator and high temperature flame rod material ensure its high heat and corrosion resistance.
• Flame Sensor for Lennox Furnace Dimension - 5.3" in length and 90 degree "crook" on end approximate 1.3".
• Heat Sensor Replaces OEM part number #69W43, 69W4301, LB-74940B, LB74940B.

The most common reasons for replacing the flame sensor are when the furnace doesn’t heat or runs only for a few minutes.Flame sensor replaces OEM part number #69W43, 69W4301, LB-74940B, LB74940B.Flame sensor 69W43 is for Lennox/Ducane/Armstrong furnaces, including Lennox ML18UH EL180 ml180uh090p36b-55 and Duncane: Confirm your original part number before you alumina ceramic insulator and high temperature flame rod material ensure its high heat and corrosion resistance.5.3" in length and 90 degree "crook" on end approximate 1.3".Package comes with 1 X OEM 69W43 flame sensor.