Description
York OEM Auto-Reset Limit Switch — S1-025-51477-000
The York S1-025-51477-000 is a genuine OEM auto-reset limit switch engineered to provide reliable over-temperature protection in York heating and HVAC systems. Designed to open at 130°F and automatically reset at 160°F (or per the rated differential), this limit switch acts as a critical safety device — shutting down burner or heating operation when temperatures exceed safe thresholds and restoring normal operation once conditions return to normal.
Key Features
- Genuine York OEM replacement part — ensures proper fit and performance
- Auto-reset operation — automatically restores system function once temperature normalizes
- 130/160°F temperature set points for precise over-temperature protection
- Protects heat exchangers, furnace components, and downstream equipment from heat damage
- Direct drop-in replacement for compatible York furnaces and air handlers
- Durable construction for long-lasting, dependable service life
Application
This limit switch is intended for use in York residential and light commercial furnaces and heating systems. It monitors supply air or heat exchanger temperatures and interrupts the heating circuit when unsafe temperature levels are detected, preventing equipment damage, nuisance shutdowns, and potential safety hazards.
Why Choose Genuine York OEM Parts?
Using genuine York replacement components ensures compatibility, maintains system warranties, and delivers the performance standards your equipment was designed to meet. The S1-025-51477-000 limit switch is the factory-specified solution for maintaining safe, efficient operation of York heating systems.









