Description
International Comfort Products 1171905 L140-55F Limit Switch Overview
The International Comfort Products (ICP) 1171905 is an OEM-replacement high-limit switch designed to protect your furnace from dangerous overheating conditions. Carrying the model designation L140-55F, this limit switch is engineered to open the control circuit at 140°F and automatically reset once temperatures drop by 55°F, helping restore normal furnace operation without manual intervention.
How It Works
A furnace limit switch is a critical safety device mounted on or near the heat exchanger. When airflow is restricted — due to a dirty filter, blocked vents, or a failed blower — temperatures inside the furnace can rise to unsafe levels. The limit switch monitors this temperature and cuts power to the burner if a threshold is exceeded, preventing heat exchanger damage, fire hazards, and carbon monoxide risks.
Key Specifications
- Manufacturer Part Number: 1171905
- Model: L140-55F
- Opens (trips) at: 140°F
- Temperature differential: 55°F (resets at approximately 85°F)
- Type: Auto-reset high-limit switch
- Application: ICP brand gas furnaces and compatible equipment
Features & Benefits
- OEM-quality replacement for International Comfort Products furnaces
- Automatic reset — no manual reset required once temperatures normalize
- Protects heat exchanger from thermal stress and premature failure
- Helps prevent fire hazards and carbon monoxide exposure
- Direct-fit replacement for accurate, reliable installation
- Essential safety component for maintaining furnace warranty and code compliance
Application
This limit switch is a direct OEM replacement for select International Comfort Products (ICP) gas furnaces. Always verify compatibility with your specific furnace model number before installation. Consult your equipment’s service manual or contact a qualified HVAC technician for proper installation guidance.
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