Lennox Brand [Lifetime Warranty] 52W29 Furnace Flame Sensor
Lifetime Warranty

[Lifetime Warranty] 52W29 Furnace Flame Sensor

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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.
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  • WIDE COMPATIBILITY

    WIDE COMPATIBILITY

    Compatible with many models of Lennox, Ducane and Armstrong Furnaces
  • DURABLE MATERIAL

    DURABLE MATERIAL

    This part is made of high-quality metal material with ceramic porcelain for superior conductivity and high reliability.
  • SAVING SOLUTION

    SAVING SOLUTION

    Enjoy the great feeling when your furnace is repaired and works properly like before, BlueStars brings DIY solutions to help you deal with any trouble
  • IMPORTANT NOTE

    IMPORTANT NOTE

    This is a replacement part designed to be compatible with certain appliances. Any brand names mentioned are used solely to indicate compatibility.
CONNECTING LIVES, ENERGIZING MOMENTS

CONNECTING LIVES, ENERGIZING MOMENTS

Brand Model Number
G40DF, G40UH 45, 45X, 70, 70X, 90, 90X, 110, 110X, 135, 155
G41UF 45, 70, 90, 110, 135; G43UF: 45, 70, 90, 90H, 110, 110H, 135 (G50DF) 45, 45X, 70, 70X, 90, 90X, 110, 110X, 135
G50UH 45, 45X, 70, 70X, 90, 90X, 110, 110X, 135, 155, I70, I70X, I90. I90XI 110, I110X, I135
G50UHI I70, I70X, I90, I90X, I110, I110X, I135
G51MP 45, 70, 90, 110, 135
G60DF 45, 45X, 70, 70X, 90, 110, 135, V70, V70X, V90, V90X, V110, V110X, V135
G60DFV V70, V70X, V90, V90X, V110, V110X, V135
G60UH 45, 45X, 70, 70X, 90, 90X, 110, 110X, 135, V70, V70X, V90, V90X, V110, V110X, V135
G60UHV V70, V70X, V90, V90X, V110, V110X, V135
61MP 45, 70, 90, 110, 135, V45, V70, V90, V91, V110, V111, V135; 61MPV: V45, V70, V71, V90, V91, V110, V111, V135