Description
The Rheem-Ruud 47-21711-08 is an OEM general purpose limit switch engineered for precise temperature control and equipment protection in Rheem and Ruud heating systems. Designed for direct board mounting with a 7-inch insertion length, this switch provides reliable automatic reset operation to keep your system running safely and efficiently.
How It Works
This SPST Normally Closed (NC) limit switch monitors supply-air or heat exchanger temperatures and interrupts the circuit when unsafe temperatures are detected. Once temperatures return to a safe level, the auto reset function automatically restores normal operation — no manual intervention required.
Key Specifications
- SKU / Part Number: 47-21711-08
- Fixed Open (Trip) Temperature: 130°F
- Fixed Close (Reset) Temperature: 110°F
- Switch Type: SPST (Single Pole, Single Throw)
- Switch Configuration: Normally Closed (NC)
- Reset Type: Automatic (Auto Reset)
- Insertion Length: 7 inches
- Mounting Style: Board Mounted
- Application: General Purpose Limit Switch
Features & Benefits
- OEM Rheem-Ruud replacement part for assured compatibility and fit
- Normally Closed design opens the circuit on high-temperature fault, protecting heat exchangers and downstream components
- Auto reset eliminates manual reset requirements after the temperature returns to a safe range
- 7-inch insertion length provides accurate sensing depth within the airstream or heat exchanger
- Board-mount configuration simplifies installation and ensures secure, vibration-resistant contact
- Fixed trip and reset points deliver consistent, repeatable performance over the life of the equipment
Application
Designed as a direct OEM replacement for Rheem and Ruud furnaces and air handlers, this limit switch is ideal for HVAC technicians performing scheduled maintenance, warranty repairs, or emergency service calls. Always verify compatibility with the specific unit model before installation.
Reviews
There are no reviews yet.