The Lennox 22W68 is an OEM replacement limit switch designed to protect furnaces and heating systems from overheating conditions. Carrying the model designation L165-40F, this high-limit control opens the circuit at 165°F to shut down the burner when temperatures exceed safe operating thresholds, and automatically resets (closes) once the temperature drops by 40°F — returning to normal operation at approximately 125°F.
This limit switch is a direct replacement for compatible Lennox furnace models, ensuring reliable, precise thermal protection and minimizing equipment downtime.
Key Specifications
- Manufacturer Part Number: 22W68
- Model: L165-40F
- Open (Trip) Temperature: 165°F
- Differential: 40°F
- Reset (Close) Temperature: Approximately 125°F
- Type: High-Limit Switch
- Brand: Lennox (OEM)
Features & Benefits
- Protects furnace heat exchanger and components from damaging overtemperature conditions
- Automatic reset operation restores normal function once safe temperatures are reached
- OEM Lennox part ensures proper fit and reliable performance in compatible equipment
- Direct drop-in replacement minimizes installation time
- Helps maintain system efficiency and extends equipment service life
Application
The Lennox 22W68 limit switch is intended for use in Lennox furnaces and heating equipment requiring a 165°F open / 40°F differential high-limit control. Always verify compatibility with your specific unit model before installation.
