White-rodgers 03L05 001S1 Snap Disc Limit Control

Product Description

The WHITE-RODGERS 03L05 001S1 is a snap disc limit control designed to monitor and interrupt electrical circuits based on temperature thresholds. It operates with an open-on-rise switch action, meaning the contacts open when the sensed temperature climbs to the cut-in range of 135 to 175 degrees F. Rated for both 120 and 240 VAC service, it handles up to 14 amps full load at 120 VAC and 10 amps full load at 240 VAC, with a resistive rating of 25 amps at both voltages. Licensed HVAC technicians and appliance service professionals are the primary installers of this control.

This snap disc control is suited for residential and light commercial heating equipment where over-temperature protection is required. Typical applications include gas furnaces, electric furnaces, and similar forced-air heating systems that require a reliable high-limit safety switch. The open-on-rise action ensures the controlled circuit is interrupted if temperatures exceed safe operating levels, protecting heat exchangers and downstream components from thermal damage.

Key Features

• Open-on-rise switch action interrupts the circuit when temperature reaches the cut-in threshold
• Cut-in temperature range of 135 to 175 degrees F for field-selectable setpoint flexibility
• Rated 14A full load at 120 VAC and 10A full load at 240 VAC
• Resistive rating of 25A at 120 VAC and 25A at 240 VAC
• Compatible with both 120 VAC and 240 VAC systems
• Compact snap disc form factor fits standard limit control mounting locations

Compatibility

Designed as an OEM-style replacement snap disc limit control for residential and light commercial forced-air heating equipment requiring an open-on-rise high-limit safety switch rated for 120 or 240 VAC circuits.

Installation Notes

Installation should be performed by a licensed HVAC technician. Always disconnect and lock out power to the equipment before removing or installing any limit control. Verify the replacement control matches the required cut-in temperature and voltage rating of the original device before energizing the system. Work should comply with applicable local codes and the equipment manufacturer's service instructions.