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The Lennox Limit Control L185 - 40F is a vital safety component designed for HVAC systems and furnace units. As a high-limit control switch, its primary function is to monitor the internal temperature of your heating equipment and provide a fail-safe against overheating. This fan disc switch is engineered to automatically interrupt the electrical circuit if the temperature exceeds the safe operating threshold, preventing potential damage to the heat exchanger and ensuring the safety of your home. It features a precise 185-degree Fahrenheit cut-out point and a 40-degree differential for reliable thermal management. This replacement thermal sensor is essential for maintaining the efficiency and longevity of residential and commercial climate control systems.
Type: High Limit Control Switch
Size: Small
Application: Commonly used in gas and electric furnaces, air handlers, and HVAC units as a primary safety limit or fan control sensor.
Specifications: Open Temperature: 185°F; Temperature Differential: 40°F; Switch Type: Fixed temperature disc; Application: Thermal safety shut-off.