69W43 Furnace Flame Sensor

69W43 Furnace Flame Sensor

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$14.04
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$14.04
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69W43 Furnace Flame Sensor

Key Features

  • Sensing rod detects flame presence for furnace operation
  • Angled probe design
  • Overall width: 4-5/8 in
  • Features a 3/16 in male terminal for connection
  • Durable construction for long service life

Replaces / Cross-Reference Part Numbers

  • 69W4301
  • LB-74940B
  • 10-6840

Compatibility & Fitment

  • Direct replacement for specific furnace models from brands including:
    • Armstrong
    • Ducane
    • Lennox
  • Verify compatibility with your furnace model number prior to purchase.

When to Replace

  • Furnace starts the ignition sequence but shuts off after a few seconds.
  • Furnace control board indicates a flame sensor fault code.
  • Visible carbon buildup, corrosion, or damage on the existing sensor rod.
  • The ceramic insulator is cracked or broken.

Installation Tips

  • Disconnect electrical power to the furnace unit before servicing.
  • Avoid touching the metal rod with bare hands; handle by the ceramic base.
  • Ensure the sensor is correctly positioned in the pilot or main burner flame.
  • Confirm the mounting screw and wire are securely fastened.
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  • FIX FURNACE SYMPTOMS

    FIX FURNACE SYMPTOMS

    Yellow burner flames | Rusted flue lines | Poor energy-efficient | Exhaust smells | Constant thermostat adjustments
  • EXTREME HEAT RESISTANT

    EXTREME HEAT RESISTANT

    - Rod Maximum Temperature: 2190°F
  • SAVING SOLUTION

    SAVING SOLUTION

    Great feeling when your furnace is repaired and works efficiently - BlueStars brings DIY solutions to help you deal with any trouble.
  • SIMPLE INSTALLATION

    SIMPLE INSTALLATION

    It’s typically mounted by a 1/4” hex head screw. Carefully remove the screw to slide the sensor out. Replace with our new one.
LONG-LASTING SOLUTION

LONG-LASTING SOLUTION

Made of high-grade wear-resistant Metal and Ceramics, ensuring durability and resilience against temperature changes
PRECISION FLAME DETECTION

PRECISION FLAME DETECTION

Ensure home's safety by automatically shutting off the furnace whenever no flame is detected inside, preventing gas leaks
ENJOY YOUR LIFE WITH OUR PART INSIDE!

ENJOY YOUR LIFE WITH OUR PART INSIDE!

BlueStars - #1 source of high-quality replacement parts