Reznor 210764 Switch

The Reznor 210764 is a low temperature oil switch engineered specifically for waste oil heating systems to ensure the burner remains within safe operational parameters. As a factory-authorized OEM replacement part, this 140°F limit switch is designed to monitor preheated oil temperature, preventing the system from firing if the oil is too cold for proper atomization. Maintaining this set point is critical for reducing soot buildup and protecting the integrity of the heat exchanger.

The Reznor 210764 Switch is built for the demanding conditions of industrial and commercial heating applications. It features an auto-reset function and is constructed with high-durability materials to withstand the thermal cycling typical of nozzle preheater blocks. By replacing a failing sensor with a genuine Reznor 210764 unit, technicians can maintain precise HVAC temperature control and optimize combustion efficiency in Reznor heating equipment.

Key Benefits:

• System Protection: Effectively prevents the burner from operating when oil falls below the 140°F threshold, avoiding incomplete combustion.
• Exact Compatibility: Designed for seamless integration with Reznor waste oil heaters, including RA, RAD, and RV models.
• Durable Construction: Engineered to handle the rigorous duty cycles of industrial preheater systems without premature failure.
• OEM Performance: Meets all original manufacturing tolerances to ensure safe system operation and regulatory compliance.

Common Questions:

What happens if the Reznor 210764 limit switch fails?
A faulty switch may keep the burner from igniting even when the oil is at temperature, or it may allow the system to fire with cold oil, leading to poor atomization and heavy smoke. Replacing the Reznor 210764 restored the necessary safety interlock.

Is the 210764 contact normally open or normally closed?
This is a low temp oil switch that closes on temperature rise to 140°F, completing the circuit to the burner once the preheater has reached the required thermal set point.

Which heater models use this switch?
This Reznor heater part fits a range of models, including the RA/RAD 140, 235, 350, and 500, as well as RV 225 and 325 units.

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.