Lennox 13W23 Limit Switch

80-140F AUTO Limit Switch

Lennox 13W23 Limit Switch – OEM Auto Reset 80°F–140°F Furnace Safety Control

The Lennox 13W23 Limit Switch is a genuine OEM auto-reset temperature limit switch designed to protect Lennox HVAC equipment from overheating. With an operating range of 80°F to 140°F, this safety control monitors internal system temperatures and automatically interrupts operation if unsafe heat levels are detected.

Engineered to Lennox factory specifications, the 13W23 limit switch delivers accurate temperature response, reliable performance, and long-lasting durability in residential and light commercial heating systems.

🔧 Product Features

• Genuine OEM Lennox Part – Factory-authorized replacement

• Part Number: 13W23

• Temperature Range: 80°F cut-in / 140°F cut-out

• Auto Reset Function – Restores operation once safe temperatures return

• Critical Safety Component – Helps prevent furnace overheating and system damage

• Durable Construction – Built for consistent performance in high-temperature environments

🏷️ Compatibility

Designed for use with Lennox HVAC and furnace systems.
Always verify part number and specifications with your equipment model and serial number before ordering.

⚙️ Function & Importance

The limit switch is a vital furnace safety device that monitors heat levels inside the unit. If temperatures exceed safe limits, the switch shuts down the burner to prevent damage. Replacing a worn or faulty switch with the OEM Lennox 13W23 auto limit switch helps maintain safe, efficient heating performance.

✅ Why Choose the Lennox 13W23 OEM Limit Switch?

Using a genuine Lennox replacement ensures proper fit, correct temperature calibration, and dependable long-term reliability—helping extend the life of your HVAC system.