Description
The Rheem 47-21900-13 is an essential OEM safety control component designed to protect your heating equipment from potentially dangerous overheating conditions. This switch is configured as a Single Pole, Single Throw (SPST) with a Normally Closed (NC) contact orientation, meaning it maintains a continuous electrical connection during normal operation. If the ambient temperature within the heating unit reaches a fixed limit of 150°F, the switch will trip and interrupt the circuit, shutting down the heating element or burner. The critical safety feature of this model is its manual reset function. Once the temperature drops and the switch is ready to re-close, it requires an operator to physically press the reset button. This prevents the unit from automatically restarting after a high-temperature event, forcing a technician to investigate and correct the underlying cause of overheating. Using a genuine Rheem replacement ensures proper calibration and system safety.
Key Features:
- Fixed Open Temperature: Guaranteed to open the circuit at a maximum safe temperature of 150 degrees F, preventing overheating damage.
- Manual Reset Functionality: Requires physical intervention after a trip, ensuring a safety check is performed before the system can restart.
- Switch Configuration: Features a single pole, single throw (SPST) normally closed contact, suitable for 230 VAC applications up to 25 Amps.
- Durable Safety Control: A vital component used in Rheem and Ruud furnaces and heating equipment (such as RGLG and RGVG series) to maintain safe operating conditions.
