Description
The York S1-025-29041-012 is a factory-spec, high-quality auto limit switch designed to safeguard HVAC systems by preventing overheating. This 3-inch insertion switch automatically monitors air temperature inside the duct or furnace plenum and interrupts system operation if temperatures reach unsafe levels. With a functional temperature range between 160 °F and 190 °F, it's engineered to open (turn off) at the high limit and close (restore operation) once the temperature drops below the safe threshold.
Key Features
- OEM-grade compatibility — Genuine part designed by York for use in their furnaces and heating systems.
- Precise temperature control — Opens at 190 °F, closes at 160 °F, helping prevent overheating hazards.
- Compact 3″ insertion design — Easy to install in ducts or furnace plenums without major modifications.
- Enhanced HVAC safety — Automatically shuts down system operation when temperatures exceed safe limits, protecting against damage and fire risk.
- Durable and reliable — Built for longevity and consistent performance with routine HVAC operation.






