White-Rodgers 3L01-200 Limit Control

The White-Rodgers 3L01-200 is an industrial-grade 3/4" snap disc limit control designed for high-limit temperature regulation in HVAC systems. Engineered as a fixed temperature limit switch, this SPST (Single Pole Single Throw) control operates on an open on rise logic, serving as a critical safety component to prevent heat exchanger overheating. It features a precise 200°F cut-out temperature and a 160°F cut-in reset point, maintaining a 40°F differential. This model is a direct OEM replacement fan limit control for Therm-O-Disc style 60T11 (Type 610016) applications. The flanged airstream mount ensures the sensing element is positioned directly in the airflow for rapid response times. Built for high-amperage loads, it provides reliable switching for furnaces, unit heaters, and commercial boilers where snap-action temperature control is required to maintain system integrity and contractor standards.

Key Benefits

• Precise Thermal Calibration: Factory-set 200°F trip point ensures consistent safety shut-off without the drift associated with adjustable controls.
• Universal Airstream Mounting: Features a standard flange design for easy integration into existing plenums or furnace cabinets.
• Direct Cross-Reference: Replaces common Therm-O-Disc 60T11 series switches, reducing diagnostic and installation time for service technicians.
• High-Capacity Switching: Heavy-duty SPST contacts are designed to handle the inductive loads found in modern heating equipment.

Common Questions

What is the difference between an open-on-rise and close-on-rise switch?
The 3L01-200 is an open-on-rise control, meaning the electrical circuit breaks when the temperature reaches the 200°F limit, stopping the heat source. A close-on-rise switch would engage a component, such as a cooling fan, when temperatures increase.

Can this limit control be used in 24V and 120V circuits?
Yes, this snap disc is designed to function across standard HVAC voltages, including 24V control circuits and 120V/240V power circuits, provided the amperage stays within the specified rating of the Therm-O-Disc 60T11 chassis.

Does the 3L01-200 require a manual reset?
No, this model features an automatic reset. Once the airstream temperature drops below the 160°F cut-in point, the contacts will mechanically close to resume normal operation.

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.