Description
York S1-SWI-180PK L180F-20F Furnace High-Limit Switch Overview
The York S1-SWI-180PK is an OEM replacement high-limit switch designed to protect your furnace from dangerous overheating conditions. Identified by its L180F-20F designation, this limit switch is engineered to open the control circuit when the heat exchanger reaches an unsafe temperature, shutting down the burner and preventing heat damage to critical furnace components.
How It Works
The L180F-20F model designation indicates the switch opens (trips) at 180°F and features a 20°F differential, meaning it automatically resets and closes the circuit once temperatures drop back to approximately 160°F. This automatic reset functionality helps restore normal furnace operation once safe conditions return, minimizing unnecessary service calls.
Key Features
- OEM York replacement part — ensures proper fit and function in compatible York furnace models
- Opens at 180°F to protect against high-temperature conditions
- 20°F differential for reliable automatic reset at approximately 160°F
- Automatic reset design for convenient, hands-free recovery
- Safeguards heat exchanger, blower components, and wiring from heat damage
- Direct OEM replacement for simplified installation
Application
This limit switch is a direct OEM replacement for select York furnace models. Always verify compatibility with your specific unit’s model and serial number before installation. Proper limit switch function is critical to safe furnace operation — a faulty or bypassed limit switch can result in equipment damage, fire hazard, or carbon monoxide risk.
Specifications
- Brand: York
- SKU: S1-SWI-180PK
- Model: L180F-20F
- Type: High-Limit Switch
- Open Temperature: 180°F
- Differential: 20°F
- Reset Type: Automatic
