White-Rodgers 3L11-230 Switch

The White-Rodgers 3L11-230 is a high-limit snap disc thermostat designed for critical safety and temperature regulation in residential and commercial HVACR systems. As a veteran-grade 1/2" bimetal disc thermostat, this open on rise switch provides reliable circuit interruption once the cut-out temperature range of 224°F to 236°F (107°C to 113°C) is met. Engineered with a Therm-O-Disc style 10861 and Type 36T22 internal construction, it features an automatic reset mechanism that re-engages once the system temperature drops by the 30°F (17°C) differential. This limit control switch is built for high-duty cycles, utilizing 1/4" quick-connect terminals for rapid field wiring and a stainless steel mounting bracket for secure attachment to ductwork or appliance chassis. Whether you are servicing furnaces or high-temp commercial blowers, this SPST switch ensures rapid contact separation and robust performance in extreme thermal environments.

• Precise High-Limit Protection: Operates as a fail-safe high limit with a 224-236°F cut-out temperature range to prevent equipment overheating.
• Universal Compatibility: Interchanges with various Therm-O-Disc 36T22 configurations, offering a versatile solution for appliance and HVAC repair.
• Durable Construction: Features a high-speed snap-action bimetal disc and stainless steel bracket to ensure long-term mechanical reliability under frequent thermal cycling.
• Simplified Installation: Standard 1/2" disc footprint and vertical quick-connect terminals reduce induction and wiring time during emergency service calls.

What is the difference between open on rise and close on rise?
The White-Rodgers 3L11-230 is an open on rise switch, meaning it breaks the electrical circuit when the temperature reaches the set point (230°F nominal). This is typically used for safety limits, whereas close on rise switches are utilized for fan activation.

Can this part be used in 240VAC applications?
Yes, the 3L11-230 is rated for both 120VAC and 240VAC circuits, commonly handling up to 15A resistive loads at 120V and 10A at 240V, making it a staple for modern furnace and boiler maintenance.

Is this a manual or automatic reset thermostat?
This model is an automatic reset snap disc. It will automatically close the circuit once the sensed temperature falls approximately 30°F below the cut-out point, eliminating the need for manual intervention after a temporary overheat condition.

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.