Reznor 82091 Limit Switch

The Reznor 82091 Limit Switch is a critical OEM safety component engineered for high-temperature regulation in commercial unit heaters and HVAC systems. This L160-50F AUTO limit switch features a 160°F trip point and a 50°F differential for automatic resetting, ensuring the burner circuit is interrupted if internal temperatures exceed safe operating parameters. Designed as a direct replacement high limit switch for Reznor UDAP, UDAS, UBX, and UDX series heaters, it provides reliable protection against heat exchanger scorching and component failure due to restricted airflow or blower malfunction.

For contractors servicing Reznor gas unit heaters, maintaining the integrity of the safety circuit is paramount. The 82091 automatic reset switch is identified by its distinctive red dot, signifying its specific temperature rating. This HVAC high limit control is built to stringent standards, offering precise thermal response and long-term durability in demanding environments. Integrating this genuine Reznor part ensures system compatibility and restores the factory-specified safety sequence required for high-efficiency heating applications.

Key Benefits for Technicians

• Precise Thermal Control: Calibrated for 160°F fixed-temperature cut-out to safeguard the heat exchanger.
• Automatic Reset Functionality: Minimizes unnecessary service calls by resetting once the temperature drops 50°F below the trip point.
• Broad Model Compatibility: Fits a wide range of Reznor units including UDAP175-225, UDAS175-225, and various UBX/UDX series configurations.
• OEM Reliability: Genuine Reznor replacement part ensures exact fit and structural integrity compared to generic alternatives.

Common Questions

What causes a limit switch like the Reznor 82091 to trip frequently?
Frequent tripping is typically caused by restricted airflow, such as a clogged air filter, blocked return vents, or a failing blower motor that cannot move enough air across the heat exchanger.

Can I use an L160-50F switch in place of a different temperature-rated limit?
No. Limit switches are safety-critical components rated specifically for the appliance's design. Substituting a different temperature rating can lead to hazardous operating conditions or premature equipment failure.

Is the Reznor 82091 a manual or automatic reset switch?
This is an automatic reset limit switch. It will close the circuit once the unit has cooled sufficiently, whereas manual reset switches require a technician to physically depress a button after a fault.

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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.