Rheem-Ruud 47-23117-03 Limit Switch

The Rheem-Ruud 47-23117-03 Limit Switch is a critical OEM replacement safety control engineered to regulate supply plenum temperatures in gas-fired comfort systems. This SPST normally closed switch is factory-calibrated with an 85 degree F fixed open temperature and a 75 degree F fixed close temperature, ensuring it breaks the burner circuit if internal cabinet temperatures exceed safe thresholds. Designed for maximum reliability in high-cycle environments, this auto reset limit switch features purple color coding for rapid field identification and utilizes 1/4 inch quick connect terminals for seamless integration into existing 230V wiring harnesses.

As a direct replacement for 47-23117-02, the 47-23117-03 is a general purpose temperature control that maintains system integrity by preventing heat exchanger damage and potential fire hazards. The surface-mount design allows for flexible positioning on the blower housing, while the L85-10F technical profile ensures precise 10-degree differential switching. For contractors managing HVAC troubleshooting, this genuine Rheem part provides the exact electrical specifications and thermal tolerances required to restore factory performance in compatible Ruud, Rheem, and WeatherKing furnaces or air handlers.

• Direct OEM Compatibility: Specifically engineered to serve as the direct replacement for 47-23117-02, ensuring zero-gap mechanical and electrical fit.
• Enhanced Safety Logic: Features SPST normally closed contacts that provide a fail-safe cutoff at 85°F to protect the heat exchanger.
• Technician-Friendly Design: The purple color coded body and auto reset function streamline diagnostics and minimize unnecessary service callbacks.
• Precision Thermal Response: Fixed 75 degree F close temperature and 85 degree F open temperature provide a tight 10°F differential for stable operation.
• Universal Wiring: Equipped with standard 1/4 inch quick connects for fast termination on standard control circuits.

Is the 47-23117-03 compatible with older furnaces?
Yes, it is the professional-grade replacement for the discontinued 47-23117-02 and is designed for use in a wide range of Rheem and Ruud gas furnaces and air handler units.

How do I know if the limit switch is failing?
Technicians typically check for short-cycling or a blower motor that runs continuously while the burners refuse to ignite. If the furnace is locked out on a high-limit code, verify airflow before replacing the limit control switch.

Can I use a manual reset switch in place of this auto reset model?
It is critical to maintain the auto reset functionality of the 47-23117-03 if specified by the manufacturer to ensure the system resumes safe operation once temperatures equalize.

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.