Reznor 152632 Firestat Kit

The Reznor 152632 Firestat Kit is a critical safety component designed for high-limit temperature monitoring in Reznor unit heaters. Engineered to trigger at a fixed 200°F setpoint, this manual reset firestat provides essential protection against overheating by interrupting the electrical circuit if internal temperatures exceed safe operating parameters. For service technicians performing maintenance or repairs, it is important to note that the 152632 is the direct replacement for 42782, ensuring backward compatibility with legacy Reznor HVAC parts. This kit includes the necessary mounting hardware for a secure installation within the heater’s discharge air stream or ductwork. Maintaining a functional unit heater high limit switch is vital for system reliability and code compliance in commercial and industrial settings. Utilizing this OEM Reznor replacement part ensures the thermal protection system matches the original engineering specifications for optimal response times and durability under high-output conditions.

Key Benefits

• Fixed 200°F Thermal Protection: Provides precise high-limit cutout to prevent heat exchanger damage or fire hazards.
• Manual Reset Mechanism: Requires technician intervention after a trip, ensuring the underlying cause of overheating is addressed before system restart.
• Direct OEM Compatibility: Serves as the factory-authorized update for the discontinued 42782 part number, streamlining inventory for HVAC contractors.
• Industrial-Grade Construction: Built to withstand the constant thermal cycling typical of Reznor gas-fired unit heaters and furnace systems.

Common Questions

Is the Reznor 152632 firestat kit a direct drop-in for older 42782 limit switches?
Yes, the 152632 is the official superseding part number for the 42782, designed to fit the existing mounting footprint and wiring harness without modification.

Can this firestat be used on other brands of unit heaters?
While the electrical ratings may be similar, this kit is specifically calibrated and listed for use with Reznor heating equipment. Proper airflow sensing and limit protection rely on the specific probe depth and temperature calibration of this OEM component.

What causes this firestat to trip regularly in a warehouse setting?
Frequent trips usually indicate restricted airflow due to dirty filters, a failing blower motor, or obstructed ductwork, causing the discharge air to reach the 200°F threshold.

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.