3L01-250 Copeland Comfort Control (White Rodgers) L250-40F
3L01-250 Copeland Comfort Control (White Rodgers) L250-40F
The 3L01-250 Snap Disc Limit Switch (White-Rodgers / Copeland Comfort Control) is an automatic reset temperature safety control designed to protect HVAC, heating, and refrigeration equipment from extreme operating temperatures. Rated with a 250°F fixed cut-out temperature and 210°F fixed cut-in temperature, this open-on-rise switch interrupts the electrical circuit when excessive temperatures are detected and automatically restores operation after the equipment cools.
Cross-Reference
- 3L01-250
- 3L01250
- L250-40F
- 60T11-610023
- White-Rodgers 3L01-250
- Copeland Comfort Control 3L01-250
Direct OEM
White-Rodgers 3L01-250
Compatible Brands
- White-Rodgers
- Emerson
- Copeland
- York
- Coleman
- Luxaire
- Goodman
- Universal HVAC Applications
- Commercial Refrigeration Equipment
Application
Used in HVAC and refrigeration systems to:
- Protect equipment from excessive temperatures
- Open the circuit at 250°F
- Automatically reset at 210°F
- Protect heaters, compressors, motors, and controls
- Prevent temperature-related equipment damage
- Maintain safe operating conditions
Related Components
- Snap Disc Limit Switch
- High Limit Control
- Fan Switch
- Fan & Limit Control
- Blower Relay
- Furnace Control Board
- Transformer
- Temperature Sensor
- Compressor Contactor
Technician Notes
The 3L01-250 is an automatic reset, open-on-rise snap disc limit switch. Under normal operating conditions the contacts remain closed. When the sensing surface reaches 250°F, the contacts open to interrupt the circuit and protect equipment from overheating. Once temperature falls to approximately 210°F, the contacts automatically reset and restore operation.
This switch is commonly used in high-temperature HVAC, heating, and refrigeration applications where reliable automatic reset protection is required. Always match the original switch action, temperature ratings, terminal configuration, and mounting style when replacing.
Common Symptoms of Failure
- Equipment shuts down on high-limit fault
- Repeated temperature safety trips
- Open limit circuit
- Intermittent operation
- No continuity through switch contacts
- Furnace or heater lockout
- Compressor protection shutdowns
- Failure to restart after overheating
Installation Tips
- Disconnect electrical power before servicing.
- Verify temperature ratings match the original switch.
- Confirm switch action is "Open on Rise."
- Mount securely against the original sensing surface.
- Inspect terminals for corrosion or heat damage.
- Check airflow and equipment temperatures.
- Verify continuity after installation.
- Test the equipment through a complete operating cycle.
Recommended Inspection Items
- Blower motor operation
- Airflow restrictions
- Air filter condition
- Heat exchanger condition
- Coil cleanliness
- Electrical terminals
- Wiring harness condition
- Control board diagnostics
- Equipment operating temperatures
- Ventilation and airflow path
Controls, Temperature, 210 degrees F Fixed Cut-in Temperature, 250 degrees F Fixed Cut-out Temperature, Open on Rise Switch Action, Snap Disc Auto Reset Limit Switch (60T11-610023)
