Reznor 210765 Temp Switch

The Reznor 210765 Nozzle Temperature Switch is a critical genuine OEM replacement part specifically calibrated for high-performance waste oil heaters and unit heaters. Factory-set at 160°F, this nozzle temp switch functions as a vital thermal control component within the oil preheater assembly, ensuring the fuel reaches the precise temperature required for stable atomization and efficient combustion. Also identified by alternate part numbers WB-10899 and RZ210765, this switch is a direct drop-in for legacy Reznor parts used in models such as the RA 140, RAD 150, and Reznor Venturion series. By regulating the nozzle line assembly, it prevents system lockouts and protects against overheating conditions, maintaining the operational integrity of your Reznor heating equipment. Professional-grade construction and exact tolerances eliminate the compatibility issues often found with universal aftermarket alternatives.

Key Benefits:

• Precise Thermal Regulation: Calibrated to activate at exactly 160°F to optimize fuel viscosity and burner reliability.
• OEM Compatibility: Replaces legacy part numbers including 106843, 122359, and 124039 for seamless field service.
• Industrial Build Quality: Features red wire leads for easy identification and secure integration into the preheater harness.
• System Safety: Acts as a primary thermal safeguard to prevent equipment damage and ensure safe HVAC operation in demanding environments.

Common Questions:

What models are compatible with the Reznor 210765?
This switch is designed for Reznor waste oil heaters including the RA and RAD series (140, 150, 235, 250, 350, 500) and Reznor Venturion models 225 and 325.

How do I know if the nozzle temp switch is failing?
Common symptoms include ignition failure due to improper oil heating or frequent system trips. Professionals should verify continuity across the 160°F temperature switch when it reaches its setpoint.

Is this the same as the low oil temperature limit?
No. While the 210765 controls the nozzle temperature, it is often paired with the Reznor 210764 low temperature limit switch to provide complete thermal management for the preheater block.

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.