The Lennox 64W71 L210-30 Limit Switch is a genuine OEM replacement component engineered to protect your Lennox furnace from overheating conditions. Acting as a critical safety device within the heating system, this limit switch monitors supply air temperatures and automatically interrupts the burner circuit when temperatures exceed safe operating thresholds — preventing heat exchanger damage, equipment failure, and potential hazards.
Why Choose the Lennox 64W71 L210-30 Limit Switch?
As a factory-authorized OEM part, the 64W71 is manufactured to the exact specifications of your Lennox heating system. Choosing a genuine Lennox limit switch ensures proper fit, reliable operation, and maintains your equipment warranty. Aftermarket substitutes may not meet the precise calibration requirements of your unit, making the OEM part the preferred choice for HVAC professionals.
Key Features
- Genuine Lennox OEM replacement limit switch
- Model designation: L210-30
- Monitors furnace air temperature to prevent overheating
- Automatically opens burner circuit upon high-temperature detection
- Auto or manual reset functionality (verify with unit specifications)
- Direct OEM fit for compatible Lennox furnace models
- Helps protect heat exchanger and extend equipment service life
Application
The Lennox 64W71 L210-30 Limit Switch is designed for use in compatible Lennox gas furnaces and air handlers. Always verify compatibility with your specific unit model number before installation. Installation should be performed by a qualified HVAC technician in accordance with local codes and the manufacturer’s service instructions.
Ordering Information
- SKU: 64W71
- Brand: Lennox
- Part Number: L210-30
- Part Type: Limit Switch








