White-rodgers 03L05 003S1 Snap Disc Limit Control

Product Description

The WHITE-RODGERS 03L05 003S1 is a snap disc limit control designed to monitor and protect heating equipment from overtemperature conditions. It operates with an open-on-rise switch action, meaning the contacts open when the sensed temperature reaches the cut-in threshold, interrupting the circuit to prevent equipment damage or unsafe operation. The cut-in temperature range spans 210 to 250 degrees F. Rated at 14A full load at 120 VAC and 10A full load at 240 VAC, with resistive ratings of 25A at both 120 VAC and 240 VAC, this control handles the electrical demands of residential and light commercial heating applications. Licensed HVAC technicians and heating equipment service pros are the primary installers.

This snap disc limit control is suited for use in furnaces, boilers, heat exchangers, and similar forced-air or hydronic heating systems where high-temperature cutout protection is required. The open-on-rise action makes it appropriate for high-limit sensing applications where the control must break the circuit before a dangerous temperature condition develops. It is a direct-replacement-style control for systems requiring a limit switch in the 210 to 250 degrees F cut-in range operating on 120 VAC or 240 VAC circuits.

Key Features

• Open-on-rise switch action interrupts the circuit at or above the cut-in temperature threshold
• Cut-in temperature range: 210 to 250 degrees F
• Full load amperage: 14A at 120 VAC, 10A at 240 VAC
• Resistive rating: 25A at 120 VAC and 25A at 240 VAC
• Compatible with both 120 VAC and 240 VAC systems
• Compact and lightweight at 0.1 pounds for easy installation in tight equipment enclosures

Compatibility

Designed as an OEM-style replacement snap disc limit control for residential and light commercial heating equipment requiring open-on-rise high-limit protection in the 210 to 250 degrees F cut-in range on 120 VAC or 240 VAC circuits.

Installation Notes

Installation should be performed by a licensed HVAC technician. Always disconnect power to the unit at the breaker or disconnect switch before removing or installing a limit control. Confirm the replacement control matches the cut-in temperature range, voltage rating, and switch action of the original. Follow applicable local codes and the equipment manufacturer's wiring diagram when reconnecting the control circuit.