Description
The York S1-025-46404-000 is an OEM replacement high-limit switch designed to protect York furnaces and heating systems from dangerous overheating conditions. Designated as the L150-40F, this limit switch is engineered to open the control circuit when the heat exchanger or plenum temperature reaches the upper limit threshold, shutting down the burner to prevent equipment damage and ensure occupant safety. Once temperatures fall to a safe level, the switch automatically resets, restoring normal furnace operation.
How It Works
The L150-40F designation indicates this limit switch opens at 150°F and features a 40°F differential, meaning the switch automatically resets at approximately 110°F. This automatic reset functionality ensures the furnace can resume normal operation once safe temperatures are restored, without requiring manual intervention.
Key Features
- OEM York replacement part — ensures proper fit and function
- L150-40F rating: opens at 150°F, resets at approximately 110°F (40°F differential)
- Automatic reset design for convenient, reliable operation
- Protects heat exchanger and furnace components from overheating damage
- Shuts down burner circuit upon detecting excessive temperatures
- Direct replacement for compatible York heating systems
- Manufactured to OEM specifications for dependable performance
Application
This limit switch is a direct OEM replacement for select York furnaces and heating equipment. Always verify compatibility with your specific model before installation. Proper installation and regular maintenance of limit switches are essential for safe and efficient furnace operation.
Installation Notes
- Refer to the York equipment service manual for installation instructions and wiring diagrams
- Disconnect power before servicing or replacing the limit switch
- Verify model compatibility using the York parts lookup or contact a qualified HVAC technician
