Lennox 38M07 Auto Limit Switch - 135-165F

The Lennox 38M07 is a single pole, single throw (SPST) auto limit switch designed to actuate at 165°F and automatically reset at 135°F. This limit switch is designed to automatically activate or deactivate circuits based on temperature, ensuring optimal performance and safety in Lennox, Armstrong, and Ducane furnaces.

Key Features:

• Temperature range: 135-165°F automatic reset
• SPST configuration for reliable switching
• 3-inch overall length for standard installations
• Crafted with high-quality materials offering exceptional durability and reliability
• Genuine OEM Lennox replacement part

Function and Safety:

The limit switch is responsible for turning on the furnace blower once the desired heat has been met inside the furnace, and without a functioning furnace limit switch, a furnace would not be able to regulate the temperature in conjunction with a thermostat. The limit switch is vital for safety, as it prevents temperatures from rising too high; if an unsafe temperature is detected, the limit switch turns off the burner until it's safe to continue.

Replacement Information:

This part replaces Lennox part numbers 38M9701, 2144494684, and 36T01B3 and is rated L165-30F. Compatible with select Lennox, Armstrong, and Ducane gas furnace models requiring a 135-165°F auto-reset limit switch.