Description
Rheem-Ruud 47-20045-03 Auto Reset Temperature Limit Switch
The Rheem-Ruud 47-20045-03 is a precision-engineered temperature control limit switch designed as a direct OEM replacement for Rheem and Ruud heating systems. Color-coded red for quick identification during installation and service, this switch provides reliable over-temperature protection to keep your equipment operating safely and efficiently.
How It Works
This limit switch monitors supply-air or heat exchanger temperatures and automatically interrupts the circuit when unsafe temperature thresholds are reached. The auto reset function restores normal operation once temperatures return to safe levels — no manual intervention required. The DPST (Double Pole, Single Throw) normally closed configuration ensures the circuit remains complete under normal operating conditions and opens on a temperature fault.
Key Specifications
- Part Number: 47-20045-03
- Fixed Close (Trip) Temperature: 130°F
- Fixed Open (Reset) Temperature: 170°F
- Switch Type: DPST (Double Pole, Single Throw)
- Normal Switch Position: Normally Closed (NC)
- Reset Type: Automatic (Auto Reset)
- Color Code: Red
Features & Benefits
- Direct OEM replacement for Rheem and Ruud furnaces and air handlers
- Auto reset design eliminates the need for manual reset after a temperature fault
- DPST switching provides simultaneous control of two circuits for added safety
- Normally closed operation ensures fail-safe circuit interruption on over-temperature events
- Red color coding allows for fast, accurate identification during installation and maintenance
- Fixed temperature settings ensure consistent, repeatable performance
Application
The 47-20045-03 is intended for use in Rheem and Ruud residential and light commercial furnaces and air handling equipment. It serves as an over-temperature safety device, protecting heat exchangers, ductwork, and connected components from damage caused by excessive temperatures. Always verify compatibility with your specific equipment model before installation.
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