House - Furnace Parts 62-23543-01 Furnace Flame Sensor Replacement - For Rheem, Ruud, WeatherKing, Thermal Zone, DuroGuard Furnace - 4 Pack
Set of four 62-23543-01 furnace flame sensors with L-shaped metal rods and white ceramic insulators.
62-23543-01 furnace flame sensor component shown with a furnace unit for sensitive flame detection.
62-23543-01 furnace flame sensor with 90-degree angle and dimensions shown on a technical product diagram.
Close-up diagram of 62-23543-01 furnace flame sensor showing sensor head, ceramic porcelain, mounting bracket, and metal rod.
62-23543-01 furnace flame sensor showing two units with white ceramic insulation and metal mounting brackets.
Technician performing a quick installation of a 62-23543-01 furnace flame sensor with step-by-step instructions.
62-23543-01 furnace flame sensor replacement part shown against a blue background with a family fireplace scene.
Set of four 62-23543-01 furnace flame sensors with L-shaped metal rods and white ceramic insulators.
62-23543-01 furnace flame sensor component shown with a furnace unit for sensitive flame detection.
62-23543-01 furnace flame sensor with 90-degree angle and dimensions shown on a technical product diagram.
Close-up diagram of 62-23543-01 furnace flame sensor showing sensor head, ceramic porcelain, mounting bracket, and metal rod.
62-23543-01 furnace flame sensor showing two units with white ceramic insulation and metal mounting brackets.
Technician performing a quick installation of a 62-23543-01 furnace flame sensor with step-by-step instructions.
62-23543-01 furnace flame sensor replacement part shown against a blue background with a family fireplace scene.
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62-23543-01 Furnace Flame Sensor Replacement - For Rheem, Ruud, WeatherKing, Thermal Zone, DuroGuard Furnace - 4 Pack

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62-23543-01 Furnace Flame Sensor

Key Features

  • Monitors burner flame to ensure safe furnace operation.
  • Signals the control system to shut off the gas valve if no flame is detected.
  • Constructed from durable stainless steel and a ceramic insulator.
  • Features a 90-degree bend for proper positioning in the flame path.
  • Package contains four individual flame sensors.

Replaces / Cross-Reference Part Numbers

  • 62-23543-01
  • 62-23543-02
  • 62-23543-03
  • 62-23543-04
  • PSE-RH8

Compatibility & Fitment

  • Designed for select furnace models from Rheem, Ruud, and Weatherking.
  • Verify compatibility by matching the part number with your existing sensor or service manual.

When to Replace

  • Furnace ignites but shuts down after a few seconds.
  • Visible corrosion or carbon buildup on the sensor rod that cannot be cleaned.
  • Furnace control board displays a diagnostic error code for flame sensor failure.

Installation Tips

  • Disconnect electrical power and shut off the gas supply to the furnace before beginning installation.
  • Handle the new sensor by its ceramic base to avoid transferring oils from your skin to the metal rod.
  • Ensure the sensor rod is correctly positioned to be engulfed by the burner flame for accurate sensing.
  • Confirm all connections are secure before restoring power and gas.
Product image
Product image
  • 62-23543-01 Furnace Burner Flame Sensor

    62-23543-01 Furnace Burner Flame Sensor

    The 62-23543-01 Furnace Burner Flame Sensor monitors the burner to detect whether or not a flame is present. If the sensor does not detect a flame, it shuts the gas valve off, preventing raw gas from dumping into your home. Over time, a flame sensor may lose its ability to sense the flame, even when the flame is present.
  • Perfect Fit

    Perfect Fit

    Exact Fit For Rheem Furnace; fits models: NORGDG, SGDG, RGDJ, RGFD, RGLG, RGLH, RGLJ, RGLK, RGLL, RGLN, RGLQ, RGLR, RGPH, RGPJ, RGPK, RGPL, RGPN, RGPP, RGPQ, RGPR, RGRA, RGRB, RGRJ, RGRK, RGRL, RGRM, RGSA, RGTA, RGTJ, RGVG, RGVH, RGVJ, 80LJ, 80LS, 80PJ, 80PS, 90RJ, 90RS, 90RT, 90TJ, 90TS, RGFE, RGFG, RGLE, RGLS, RGLT, RGPE, RGPS, RGPT, RGRS, RGRT, RGTS, SGPG, SGPN
  • Premium Quality

    Premium Quality

    The product is made of strong & durable materials that prevents cracking and failing during the installation and use process.
  • Saving Solution

    Saving Solution

    Enjoy the great feeling when your furnace system is repaired and works properly like before - BlueStars brings DIY solutions to help you deal with any trouble.
Style
‎90° angled rod
Length (Mounting Flange to Sensor Tip)
‎2-1/2"
Sensor Offset Length
‎1-9/16"
Angle Offset
‎90°
Termination
‎1/4" male quick-connect (spade)
Material
‎Metal flame rod with alumina-ceramic insulator

FAQ

This sensor is designed for use with Rheem, Ruud, WeatherKing, Thermal Zone, and DuroGuard gas furnaces. It is a direct replacement for systems requiring part number 62-23543-01, including those originally equipped with 62-23543-02, 62-23543-03, and 62-23543-04.
The most common symptom is the furnace burner igniting for a few seconds and then shutting off immediately. This happens because the sensor is unable to detect the flame, causing the control board to cut the gas supply as a safety precaution. If your furnace cycles on and off repeatedly without staying lit, the sensor is often the culprit.
Over time, carbon buildup, oxidation, or soot deposits accumulate on the sensor rod. This layer acts as an insulator, preventing the sensor from completing the electrical circuit through the flame. While cleaning the sensor with a fine-grit abrasive pad can sometimes provide a temporary fix, replacing it is the reliable solution when the rod is heavily pitted or damaged.
Replacing the flame sensor is a straightforward task that typically takes 10 to 15 minutes. You will generally need a 1/4-inch nut driver to remove the mounting screw and a pair of needle-nose pliers to disconnect the wire terminal. Always ensure the power to the furnace is turned off at the service switch or breaker before beginning the repair.
Yes, this unit serves as a replacement for 62-23543-01, 62-23543-02, 62-23543-03, 62-23543-04, and 28PV52.
No, this is not a universal part. It is specifically engineered for systems that utilize flame rectification for ignition confirmation within the specified Rheem, Ruud, WeatherKing, Thermal Zone, and DuroGuard product lines. It should only be used in systems where it is a listed or cross-referenced replacement.