Description
The Copeland 3F11-140 is a temperature-activated fan control switch designed to regulate blower operation in HVAC and heating systems. This close-on-rise control engages the circuit at approximately 140°F (range 135°F–145°F), activating the blower fan once the system reaches operating temperature. As the temperature drops, the switch automatically resets, turning the fan off without manual intervention. Built with a dependable bimetal disc, the 3F11-140 provides accurate temperature response and consistent performance in furnaces, unit heaters, and air handling equipment.
Key Features
- Close-on-rise temperature rating: approximately 140°F (135°F–145°F range)
- Automatic reset for continuous cycling
- Bimetal disc for accurate and repeatable temperature sensing
- Controls blower fan operation in heating systems
- Helps improve comfort and airflow efficiency
- Suitable for furnaces, unit heaters, and air handlers
- OEM-grade construction from Emerson / White-Rodgers
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