Rheem-Ruud 47-25350-01 Limit Switch

The Rheem-Ruud 47-25350-01 Limit Switch is a critical safety component designed for precise thermal monitoring in HVAC furnace applications. This board-mounted, SPST normally closed switch is engineered to open the circuit at a 190-degree F fixed temperature, effectively mitigating overheating risks. Once the system cools to 170 degrees F, the device utilizes an auto-reset mechanism to restore operation. Featuring a 3-inch insertion length and distinct red/red color coding for quick identification, this OEM replacement part ensures exact compatibility with Rheem, Ruud, and WeatherKing equipment. For contractors performing furnace limit switch replacement, this general-purpose switch provides the reliability required for high-cycle performance in residential and light commercial heating systems. Proper installation on the control board facilitates seamless integration into the factory safety string, maintaining strict BTU output regulation and protecting the heat exchanger from excessive thermal stress.

• Direct OEM Compatibility: Verified for use in specific Rheem/Ruud furnace models to ensure proper fitment and thermal response.
• Precise Thermal Calibration: Fixed 190°F open and 170°F close settings prevent nuisance tripping while maintaining safety standards.
• Durable Construction: Built for board-mounted high-heat environments with a 3" probe for accurate internal plenum temperature sensing.
• Automatic Reset Functionality: Minimizes system downtime by automatically closing the circuit once temperatures return to safe operating levels.

How do I identify if the 47-25350-01 is the correct limit switch for my unit?
Verify the color coding (Red/Red) and the fixed temperature rating (190°F) against your furnace's service manual. This model features a 3-inch insertion depth specifically for board-mounted configurations.

What causes a furnace limit switch to trip repeatedly?
Repeated tripping usually indicates restricted airflow, often due to a dirty air filter, blocked return ducts, or a failing blower motor, rather than a faulty switch.

Can I use a universal limit switch instead of the Rheem 47-25350-01?
It is recommended to use the OEM Rheem-Ruud 47-25350-01 to ensure the 190-degree trip point matches the original safety specifications of the heat exchanger design.

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.