Rheem-Ruud 47-23113-02 Limit Switch

The Rheem-Ruud 47-23113-02 Limit Switch is a critical safety component designed for precise thermal regulation in residential air handlers and heating systems. As a genuine OEM HVAC replacement part, this SPST normally closed switch prevents heat exchanger or plenum damage by interrupting the circuit when temperatures exceed safe operating limits. Specifically engineered to open at 180°F and automatically reset at 100°F, this auto-reset limit switch ensures continuous system monitoring without requiring manual intervention after a high-temperature event. This blue color-coded control is built with an enclosed disc face for increased durability against terminal corrosion and debris interference. With a maximum current rating of 25A and a shallow 3/8" mounting insertion depth, it serves as a universal furnace limit switch for various Rheem, Ruud, WeatherKing, and Thermal Zone platforms. To maintain system integrity and prevent furnace short cycling, technicians should verify continuity across terminals to confirm the switch is closed under normal ambient conditions.

Key Benefits

• Verified OEM Compatibility: Direct replacement for Rheem-Ruud 47-23113-02, ensuring proper fit and factory-spec performance in compatible air handler units.
• Precision Thermal Calibration: Fixed setpoints for 180°F (Open) and 100°F (Close) provide consistent safety shut-off to prevent equipment overheating.
• Reduced Downtime: The automatic reset functionality allows the system to resume operation once the internal temperature stabilizes below the fixed threshold.
• Rugged Construction: Features a high-amperage 25A rating and color-coded housing for rapid field identification during HVAC troubleshooting.

Common Questions

Is this a manual or automatic reset switch?
This is an auto-reset switch. It will automatically re-close the circuit once the sensed temperature drops to 100°F, unlike manual reset limits which require a physical button press.

What does the blue color coding indicate?
In Rheem and Ruud systems, blue color coding is used to identify specific temperature ranges and switch classifications, helping technicians quickly select the 47-23113-02 for general-purpose thermal protection.

Why is my furnace or air handler short cycling with this part?
Short cycling often occurs if the limit switch opens because the system is actually overheating, usually due to restricted airflow, a dirty filter, or a failing blower motor, rather than a defect in the switch itself.

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.