Description
The Copeland 3L09-18 is an automatic reset limit switch designed for temperature regulation and overheat protection in HVAC and heating equipment. This bimetal disc switch opens at 155°F and automatically resets (closes) at 125°F, helping maintain safe operating conditions in furnaces, unit heaters, and air handling systems. Its compact design and dependable temperature response make it suitable for OEM replacement or service applications where consistent thermal cycling is required. Built for durability, the 3L09-18 ensures reliable performance in demanding environments.
Key Features
- Temperature rating: Opens at 155°F, closes at 125°F
- Automatic reset operation for continuous cycling
- Bimetal disc for accurate and repeatable temperature control
- Designed for HVAC limit control and overheat protection
- Compact design for easy installation in tight equipment spaces
- Commonly used in furnaces, air handlers, and unit heaters
- OEM-grade quality from Emerson / White-Rodgers
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