Description
The York S1-025-38412-000 is an OEM automatic-reset limit switch engineered to protect York heating systems from dangerous overtemperature conditions. With a calibrated operating range of 100–125°F, this limit switch continuously monitors heat exchanger or plenum temperatures and automatically interrupts the burner circuit when temperatures exceed the safe threshold — then resets itself once conditions return to normal, minimizing downtime and service calls.
Key Features
- OEM York replacement part — direct drop-in fit for compatible York furnace and air handler models
- Automatic (AUTO) reset operation — restores normal function once temperatures fall back within the safe range
- Operating temperature range: 100–125°F
- Provides reliable overheat protection for the heat exchanger and surrounding components
- Helps prevent heat exchanger damage, nuisance shutdowns, and potential safety hazards
- Durable construction built to York OEM specifications for long service life
Application
Designed as a direct OEM replacement for York furnaces and heating systems requiring a 100–125°F automatic-reset high-limit switch. Always verify compatibility with your specific York model before installation.
Why Choose an OEM York Limit Switch?
Using a genuine York replacement limit switch ensures proper calibration, reliable operation, and continued warranty compliance. Aftermarket substitutes may not meet the precise temperature tolerances required for safe system operation.
Specifications
- Part Number: S1-025-38412-000
- Brand: York
- Switch Type: Automatic (AUTO) Reset Limit Switch
- Temperature Range: 100–125°F
- Application: York furnaces and heating systems









