Lennox 20W37 Auto Reset Limit Switch F - 120-160

The Lennox 20W37 is a genuine OEM automatic limit switch designed to provide critical temperature monitoring and over-temperature protection for residential and light commercial HVAC heating systems. This safety control continuously monitors system temperature and automatically interrupts the electrical circuit when temperatures reach the 120-160°F operating range, preventing potential equipment damage and ensuring safe system operation.

Key Features:

• Temperature range: 120-160°F operating threshold
• Auto-reset functionality for convenient operation
• SPST (Single Pole Single Throw) switch configuration
• Genuine Lennox OEM part ensuring exact fit and compatibility
• Lightweight construction at approximately 0.05 lbs
• Direct drop-in replacement for easy installation

This limit switch is also known by the alternate part number 100847-06 and serves as a critical safety component in furnace and heating system applications. As a genuine Lennox part, it maintains published system efficiencies, ratings, and certifications while preserving the unit's original performance characteristics.