Description
The Rheem-Ruud PD476634 is an OEM replacement L145-40F high-limit switch engineered to protect your furnace from dangerous overheating conditions. When supply air temperatures exceed the set point, this limit switch interrupts the burner circuit, shutting down the heating cycle and preventing heat exchanger damage or fire hazards. Once temperatures return to a safe operating range, the switch automatically resets to restore normal furnace operation.
Key Features
- OEM Rheem-Ruud replacement part — ensures proper fit and function
- L145-40F designation: opens at 145°F, closes with a 40°F differential (resets at approximately 105°F)
- Automatic reset operation for reliable, continuous protection
- Interrupts burner circuit on high-temperature fault to safeguard heat exchanger
- Designed for use in Rheem and Ruud gas furnace applications
- Durable construction for long service life in demanding HVAC environments
Application
This limit switch is a direct OEM replacement for select Rheem and Ruud gas furnaces. It is mounted in the furnace plenum or heat exchanger area to monitor supply air temperature. Always verify compatibility with your specific furnace model before installation.
Specifications
- Part Number: PD476634
- Switch Type: L145-40F High-Limit
- Open Temperature: 145°F
- Differential: 40°F
- Reset Temperature: ~105°F
- Reset Type: Automatic
- Brand: Rheem-Ruud
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