543-057

Ensure the safety and efficiency of your heating system with this premium 3-inch high limit switch. Designed as a vital thermal protection component for furnaces and HVAC equipment, this L150-30F limit control monitors internal temperatures to prevent overheating. The switch is engineered to automatically trip when the system reaches a 150-degree threshold, safely interrupting the circuit to prevent damage to the heat exchanger or other sensitive components. Once the temperature drops by 30 degrees, the switch resets to allow for normal operation. A malfunctioning limit switch is a common cause of furnace short-cycling or a total failure to heat; replacing it with this high-precision sensor helps maintain consistent indoor comfort and reliable appliance performance. This durable safety component is essential for residential and commercial forced-air heating systems.
Type: High Limit Control Switch
Size: 3-inch probe length
Dimensions: 3 in
Application: Commonly used in forced-air furnaces, HVAC units, and heating systems as a safety cut-out to prevent thermal overload.
Specifications: Temperature Limit: 150°F; Temperature Differential: 30°F; Configuration: L150-30F; Reset Type: Automatic