[Black Friday Deal] - 52W29 Furnace Flame Sensor

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$12.64
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$12.64
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52W29 Furnace Flame Sensor

Key Features

  • Monitors burner flame to ensure safe furnace operation.
  • Direct replacement for the original manufacturer's part.
  • Overall length: 5.25 inches.
  • Sensing rod length: 2.75 inches.
  • Constructed with a high-temperature resistant metal rod and ceramic insulator.

Replaces / Cross-Reference Part Numbers

  • 52W29
  • 52W2901
  • 31L71
  • 31L7101
  • 102431-01
  • LB-74940A

Compatibility & Fitment

  • Fits specific gas furnace models from Lennox, Armstrong, and Ducane.
  • Compatible with furnace series including G40, G41, G50, G51, G60, G61, and G71.

When to Replace

  • Furnace ignites but shuts down after a few seconds.
  • Furnace fails to heat consistently or at all.
  • The sensor rod is visibly corroded, cracked, or has heavy carbon buildup that cannot be cleaned.

Installation Tips

  • Disconnect all electrical power to the furnace before servicing.
  • Handle the component by its metal bracket to avoid damaging the ceramic insulator.
  • Ensure the sensor rod is properly positioned in the flame path for correct operation.
  • Verify a secure wire connection before restoring power.