Copeland Comfort Control (White Rodgers) 3L11-110 Limit Switch

The Copeland Comfort Control (White Rodgers) 3L11-110 is a high-performance 1/2" bimetal disc limit switch engineered for precise thermal regulation in industrial and residential HVACR systems. Built on the reliable 36T21-10845 platform, this snap-action thermostat features a fixed set point, calibrated to open on rise between 105°F and 115°F. With a 30°F differential, the SPST switch action ensures a consistent auto reset response once the ambient temperature drops, maintaining system uptime without manual intervention. The aluminum disc cup and stainless steel mounting brackets provide superior thermal transfer and physical durability in demanding environments.

For contractors, the White Rodgers 3L11-110 offers a versatile footprint with 1/4" quick connect terminals and a loose ring flange, facilitating seamless integration as a high limit safety or regulating control. Rated for 15A at 120VAC and 10A at 240VAC, this snap disc thermostat handles inductive and resistive loads with high-speed contact separation to minimize arcing. Whether you are servicing a furnace, unit heater, or commercial appliance, this genuine OEM replacement part ensures accurate temperature control and long-term reliability in the field.

Key Benefits:

• Precision Thermal Trip: Fixed 105-115°F range effectively prevents overheating in sensitive heat exchangers and air streams.
• Automated System Recovery: Integrated auto reset functionality eliminates service calls for manual resets after standard thermal cycling.
• Industrial-Grade Construction: Features stainless steel mounting brackets and an aluminum cup for corrosion resistance and rapid thermal sensitivity.
• Broad Compatibility: The 1/2" disc design is a standard form factor for a wide array of HVACR equipment and commercial appliances.
• High Electrical Capacity: Robust 15A rating makes it suitable for direct-line voltage applications without the need for auxiliary relays.

Common Questions:

• What is the difference between open on rise and close on rise? This 3L11-110 is "open on rise," meaning it breaks the electrical circuit when the temperature hits the 105-115°F limit, serving as a safety cutoff.
• Can I use this to replace a manual reset limit? No. This is an automatic reset switch. For safety reasons, never replace a manual reset limit with an auto-reset model unless specified by the equipment manufacturer.
• How do I mount this switch? The loose ring flange allows you to rotate the switch to line up with existing hole patterns for easier terminal positioning in tight furnace cabinets.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.