Copeland Comfort Control (White Rodgers) 3L11-160 Limit Switch

As a veteran technician, you know that a reliable fixed-temperature safety control is non-negotiable for system integrity. The Copeland Comfort Control (White-Rodgers) 3L11-160 Limit Switch is a 1/2-inch bimetal disc control designed specifically for high-limit applications in HVAC and heating equipment. This SPST open on rise switch provides fast, positive contact separation via its snap-action design, ensuring long-term contact life and preventing nuisance trips. With a temperature setpoint range of 155°F to 165°F and a 30°F differential, this automatic reset limit switch restores circuit continuity once temperatures return to safe operating levels. It is a direct OEM replacement limit switch for several residential and commercial heating units, cross-referencing to the 36T21-10851. Rated for up to 15 Amps at 240 VAC, it offers the robust electrical capacity required for demanding field environments, keeping your equipment protected from overheating while maintaining tight operational tolerances.

Key Benefits for Contractors:

• Fast-Response Protection: The bimetal disc limit switch utilizes snap-action technology for immediate circuit interruption when the 160°F threshold is reached.
• Broad Compatibility: Functions as a high-authority HVAC safety limit switch for a wide range of furnaces and heat pumps.
• Reduced Maintenance: The automatic reset feature eliminates the need for manual intervention after a temporary temperature excursion.
• Durable Construction: Engineered by White-Rodgers for high-speed contact separation, maximizing the service life of the internal silver contacts.
• Easy Retrofitting: Compact 1/2" disc footprint allows for seamless installation in existing mounting brackets and tight enclosures.

Common Questions & Technical Support:

How do I verify if the 3L11-160 is the correct replacement?
Check your original part for the temperature stamp and switch action. This model triggers between 155°F and 165°F and is an open on rise switch, meaning it cuts power when it gets hot. Comparing it to cross-reference 36T21-10851 will also confirm compatibility.

Does this switch require a manual reset button?
No, this is an auto-reset limit switch. Once the heat exchanger or plenum cools down by approximately 30°F from the trip point, the contacts will automatically close to resume heating operations.

What is the maximum electrical load for this control?
The 3L11-160 is rated for 15 Amps at 120 VAC and up to 10 Amps at 240 VAC, making it suitable for both pilot duty and some direct-load applications.

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.