Rheem-Ruud 47-25350-02 Limit Switch

The Rheem-Ruud 47-25350-02 Limit Switch is a critical safety component designed for precise thermal regulation in furnace blower groups and heat exchanger assemblies. This OEM furnace limit switch operates as an SPST normally closed switch, engineered to open the circuit at a 210 degrees F fixed open temperature to prevent equipment overheating and subsequent heat exchanger fatigue. Once the internal plenum temperature stabilizes to the 190 degrees F fixed close temperature, the auto reset mechanism restores electrical continuity. Featuring a 3-inch insertion length and a board-mounted configuration with a 60-degree strap angle, this switch ensures high-accuracy sensing within the airflow stream. This blue/blue color-coded high-limit control replaces aging or failed L210-20 switches, specifically cross-referencing with part numbers 47-24006-02 and 47-24017-02. Designed for direct compatibility with RGSA, RGGE, and RGJF gas furnace models, this switch features standard 1/4-inch quick-connect terminals for reliable field installation by service contractors.

Key Benefits for HVACR Technicians

• Precise Thermal Protection: Calibrated for a 20-degree differential (210°F Open / 190°F Close) to ensure the Rheem-Ruud limit switch maintains strict safety tolerances.
• OEM Compatibility: A direct-fit Rheem furnace replacement part that eliminates the need for field modifications on board-mounted setups.
• Durable Construction: Features an enclosed disc face and a TOD 36T series thermostatic element for high-cycle reliability in residential heating applications.
• Standardized Fitment: The 3" insertion depth is optimized for airflow sensing in the main furnace plenum or blower housing.

Common Questions

What does the blue/blue color coding signify?
The color coding on the 47-25350-02 is used by Rheem-Ruud to quickly identify the thermal range and switch type, ensuring technicians install the correct L210-20 rated component in the field.

Is this switch compatible with multi-stage furnace models?
Yes, this switch is designed for use in various gas furnace platforms, including the RGGE and RGJF series, provided the technical specifications for the 210-degree cutout match the manufacturer's original part requirements.

Why would a limit switch keep tripping even after replacement?
If a new Rheem-Ruud 47-25350-02 continues to open, investigate potential system-wide issues such as a clogged air filter, a failing blower motor, or restricted ductwork, which result in insufficient airflow over the heat exchanger.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.