Flame Sensor

Rheem-RUUD 62-23543-01 Flame Sensor – Direct Replacement for OEM Furnace Applications

The Rheem-RUUD 62-23543-01 flame sensor is a direct replacement component used in gas-fired furnaces to verify burner ignition. Installed in the burner assembly, this sensor detects flame presence by generating a microamp signal that is read by the integrated control module. If flame is not detected within the designated trial-for-ignition period, the control shuts down the burner to maintain system safety.

Constructed for high-temperature environments, this sensor features a robust ceramic insulator and a stainless-steel rod, ensuring durability and reliable signal transmission. It is specifically designed for compatibility with selected Rheem and RUUD furnace models.

Product Features

• OEM Part Number: 62-23543-01
• Application: Flame rectification sensor for gas furnace burner assemblies
• Mounting: Pre-formed terminal and mounting bracket for direct fit
• Rod Material: Stainless steel
• Insulator: High-temperature ceramic
• Lead Connection: Spade terminal

Intended Use

This sensor is engineered for use in furnaces that utilize flame rectification for ignition confirmation. The 62-23543-01 is not universal and should be used only in systems where it is a listed or cross-referenced replacement part. Typical installation locations include inshot burner assemblies or pilot burner assemblies, depending on furnace model.

Installation Guidelines

Installation should be performed with the furnace powered off and after verifying system compatibility. The sensor mounts via bracket and connects via quick-disconnect terminal. Proper alignment in the burner flame path is essential for reliable flame sensing. Ensure lead wire and ceramic housing are free from cracks, corrosion, or carbon deposits before commissioning.

Technical Specifications

• Sensor Type: Flame rectification rod
• Material: Stainless-steel rod with ceramic insulator
• Connection Type: Spade terminal
• Compatibility: Select Rheem and RUUD gas furnaces (verify model before ordering)
• Operating Temperature: Suitable for high-heat exposure near burners

Note for Technicians

Routine inspection and cleaning of the flame sensor are recommended during annual maintenance. Use fine steel wool or an abrasive pad to remove carbon buildup on the sensor rod if flame signal strength is low. Always confirm microamp signal output with a meter during commissioning (typically 1–5 μA DC in a steady flame).

The Rheem 62-23543-01 is a critical safety component and must be maintained in good condition for proper burner operation and to avoid nuisance lockouts.