White-Rodgers 3L01-190 Limit Switch

The White-Rodgers 3L01-190 is a high-limit snap disc auto reset limit switch engineered for precision thermal regulation in residential and commercial HVAC applications. Featuring an open on rise switch action, this control is calibrated to cut out at a fixed temperature of 190°F and automatically reset, or cut in, at 150°F. Built for industrial reliability, the 3L01-190 is a drop-in replacement for the 626437R and is categorized under technical model number 60T11-610015. For service technicians, this HVAC high limit replacement provides a robust solution for ensuring heat exchanger safety by preventing over-temperature conditions. Its 3/4-inch disc design allows for quick thermal response times and versatile mounting in various furnace and air handler cabinets. When replacing an OEM 190-degree limit switch, verifying the fixed temperature differential is critical for maintaining system sequence of operations and preventing short-cycling or safety lockouts.

• Technical Specifications: Pre-set 190°F cut-out and 150°F cut-in ensure consistent thermal safety without manual intervention.
• Broad Compatibility: Directly replaces the Nordyne 626437R and 60T series controls across multiple equipment brands.
• Reliable Switching: Single pole single throw (SPST) configuration with high-quality contacts for long-term electrical durability.
• Simplified Installation: Standard 3/4" snap disc footprint facilitates fast field replacement during emergency service calls.

Common HVAC Technical Questions

Is the White-Rodgers 3L01-190 a manual or auto-reset switch?
This is an auto-reset limit switch. Once the temperature drops to the 150°F cut-in point, the snap disc contacts will automatically re-close to restore the circuit.

Can I use the 626437R instead of the 3L01-190?
Yes, the 3L01-190 is technically identical to the 626437R and the 60T11-610015, making them interchangeable in HVAC applications requiring these specific thermal parameters.

What is the orientation of the switch action?
This control features Open on Rise (OOR) logic, meaning the electrical circuit is interrupted as the temperature reaches the 190°F threshold.

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.