Description
The Copeland 3L01-120 is a snap disc fan and limit control calibrated to open on a temperature rise between 110°F and 120°F, providing temperature-actuated circuit interruption for fan control, high-limit protection, and equipment sequencing applications in residential and light commercial HVAC heating systems. The open-on-rise action interrupts the circuit when the sensed surface or contact temperature reaches the factory-set threshold, making the 3L01-120 well suited for supply air fan disable controls, overtemperature protection circuits, and auxiliary equipment shutoff applications where a defined upper temperature limit must trigger a circuit open condition. The 110°F to 120°F operating range positions this control in the lower end of the typical furnace fan and limit control spectrum, making it appropriate for applications requiring fan shutoff or equipment protection at moderate temperature thresholds such as cooling coil freeze protection, ventilation fan control, and heat exchanger surface monitoring in low-temperature heating applications. The disc mounts directly to a duct wall, heat exchanger surface, or equipment panel for accurate and responsive contact temperature sensing. As an OEM-quality White-Rodgers replacement, the 3L01-120 is a direct-fit service component for HVAC heating systems and control assemblies that specify a snap disc control in this temperature range.
Key Features
- Opens on temperature rise with a factory-calibrated set point range of 110°F to 120°F
- Suitable for fan control, high-limit protection, and equipment sequencing in residential and light commercial HVAC systems
- Open-on-rise action suited for fan disable, overtemperature shutoff, and freeze protection circuit applications
- 110°F to 120°F range appropriate for moderate-threshold applications including cooling coil freeze stats and low-temperature heat exchanger monitoring
- Direct surface or duct-mount installation for accurate and responsive contact temperature sensing
- Snap disc bimetal element delivers fast, repeatable switching response without external power or control signals
- Single-pole switching configuration compatible with standard HVAC control circuit wiring
- OEM-quality White-Rodgers replacement for heating systems and control assemblies specifying snap disc controls in this temperature range
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