Lennox 71W41 L135-30F Limit Switch Overview
The Lennox 71W41 is an OEM replacement limit switch designed to provide dependable over-temperature protection in Lennox heating systems. Identified by model designation L135-30F, this limit switch is engineered to open the control circuit when the heat exchanger or plenum reaches an unsafe temperature, shutting down the burner to prevent equipment damage and potential fire hazards. Once temperatures return to a safe operating range, the switch automatically resets, restoring normal furnace operation.
Key Features
- OEM Lennox replacement part — ensures proper fit and performance
- L135-30F designation: 135°F limit set point with a 30°F differential
- Automatic reset operation for convenient, reliable cycling
- Protects heat exchanger and furnace components from overheating
- Designed for direct drop-in replacement on compatible Lennox furnace models
- Helps maintain system efficiency and extend equipment service life
Product Specifications
- Brand: Lennox
- SKU: 71W41
- Model: L135-30F
- Type: Limit Switch
- Limit Set Point: 135°F
- Differential: 30°F
Application
This limit switch is a critical safety component in Lennox gas and oil furnaces. It monitors plenum or heat exchanger temperatures and interrupts the burner circuit if an over-temperature condition is detected. Always verify compatibility with your specific Lennox furnace model before installation. Consult your equipment’s service manual or a qualified HVAC technician for proper installation guidance.
