Description
Lennox 18M10 L160-40F Furnace High-Limit Switch
The Lennox 18M10 is an OEM replacement high-limit switch designed to protect your furnace from dangerous overheating conditions. Featuring an L160-40F rating, this limit switch opens the circuit at 160°F and automatically resets once the temperature drops back to 120°F (40°F differential), restoring normal furnace operation safely and reliably.
How It Works
The high-limit switch continuously monitors heat exchanger or plenum temperatures. If temperatures rise above the rated setpoint — due to restricted airflow, a dirty filter, or a blower malfunction — the switch opens to shut down the burner and prevent damage to the heat exchanger or fire hazard. Once the unit cools to the reset temperature, the switch closes and allows normal operation to resume.
Key Specifications
- OEM Part Number: 18M10
- Switch Type: High-Limit (Automatic Reset)
- Opens At: 160°F
- Resets At: 120°F
- Differential: 40°F
- Compatible Brand: Lennox
Features & Benefits
- Direct OEM replacement for Lennox heating systems
- Automatic reset operation for convenient, reliable performance
- Protects heat exchanger from thermal stress and damage
- Helps prevent fire hazards caused by furnace overheating
- Precise temperature actuation for accurate safety control
Application
The Lennox 18M10 limit switch is intended for use in Lennox gas furnaces and heating systems requiring an L160-40F high-limit control. Always verify compatibility with your specific unit model before installation.
Reviews
There are no reviews yet.