Description
The York S1-025-46403-000 is an OEM replacement high-limit switch designed to protect York furnaces from dangerous overheating conditions. Identified by its L140-40F designation, this limit switch is a critical safety component in forced-air heating systems, monitoring heat exchanger temperatures and shutting off the burner when unsafe temperature thresholds are reached.
How It Works
The limit switch continuously monitors the temperature inside the furnace plenum or heat exchanger. When temperatures rise beyond the rated set point, the switch opens the control circuit, cutting power to the burner to prevent equipment damage, heat exchanger failure, or fire hazard. Once the furnace cools to the reset temperature, the switch automatically closes and normal operation resumes.
Key Features
- OEM York replacement part — ensures proper fit and function
- L140-40F rated limit switch for reliable high-temperature protection
- Automatic reset operation for convenient, hands-free recovery
- Designed to protect heat exchangers and extend furnace service life
- Direct drop-in replacement for compatible York furnace models
- Built to withstand the demanding thermal cycles of residential and light commercial heating equipment
Specifications
- SKU: S1-025-46403-000
- Model: L140-40F
- Brand: York
- Type: High-Limit Switch
- Operation: Automatic Reset
- Application: York forced-air furnaces
Application
This limit switch is intended for use in York brand furnaces as a direct OEM replacement. Always verify compatibility with your specific furnace model number before installation. Proper installation by a qualified HVAC technician is recommended to ensure safe and code-compliant operation.
