Description
Rheem-Ruud 47-25349-06 General Purpose Limit Switch Overview
The Rheem-Ruud 47-25349-06 is a board-mounted general purpose limit switch engineered for precise high-temperature protection in furnace and air handler applications. With a fixed open temperature of 210°F and a fixed close temperature of 190°F, this limit switch reliably interrupts the circuit when unsafe heat levels are detected and automatically resets once temperatures return to a safe operating range — helping protect heat exchangers, blower assemblies, and downstream components from thermal damage.
Key Features
- Fixed open (trip) temperature: 210°F
- Fixed close (reset) temperature: 190°F
- Switch type: SPST (Single-Pole, Single-Throw) Normally Closed
- Auto-reset operation — no manual intervention required after temperature normalizes
- 3″ insertion length for proper sensing depth in the airstream or heat exchanger plenum
- Board-mounted design for direct integration with furnace control boards
- Brown/Brown color-coded leads for easy identification and installation
- OEM replacement part for Rheem and Ruud heating equipment
Application
This limit switch is a direct OEM replacement designed for Rheem and Ruud gas furnaces and heating systems. It serves as a critical safety device, monitoring supply air or heat exchanger temperatures and cutting power to the burner or system when temperatures exceed the 210°F threshold. The SPST normally closed configuration ensures the circuit remains complete during normal operation and opens only upon an over-temperature condition.
Installation Notes
- Board-mounted configuration — mounts directly to the furnace control board or mounting bracket
- 3″ insertion length ensures accurate temperature sensing within the airstream
- Color-coded Brown/Brown leads simplify wiring and replacement
- Always verify compatibility with your specific Rheem or Ruud model before installation
- Consult equipment service manual for proper torque and mounting specifications
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