Reznor 45602 Limit Switch

The Reznor 45602 Limit Switch is a critical safety component designed for precise thermal regulation in Reznor unit heaters and HVAC systems. Built for heavy-duty commercial and industrial environments, this 120-180F auto limit switch serves as a high temperature limit control, monitoring internal heat exchanger temperatures to prevent overheating. As a genuine OEM Reznor replacement part (also referenced as RZ045602), it ensures exact calibration and a proper fit for series like the UDAP, UDAS, UDBP, and UDBS. The automatic reset functionality allows the system to resume normal operations once the temperature drops below the safety threshold, reducing downtime for contractors. This HVAC high limit thermostat features a compact design for streamlined integration into existing fan and limit control circuits. By installing a verified Nortek Global HVAC manufactured switch, technicians maintain the original safety specifications of the equipment, safeguarding against heat exchanger damage and ensuring reliable system cycling during peak demand.

• Precise Thermal Safety: Operates within a 120-180 degree Fahrenheit range to protect internal components from excessive heat.
• Automatic Reset Action: Eliminates the need for manual intervention by resetting the circuit once safe operating temperatures are restored.
• Broad Unit Compatibility: Directly compatible with popular Reznor heater models including UDAP60 through UDAP400 and UDAS series.
• OEM Integrity: High-quality construction from Nortek Global HVAC guarantees long-term durability in high-cycle environments.
• Efficient Troubleshooting: Resolves common issues such as unit heater short cycling or blowers that fail to engage due to faulty limit sensing.

• How do I know if the Reznor 45602 is the correct switch for my unit? This part is designed for models with an 180F high-limit requirement, including the UDAP and UDAS series. Check your unit’s wiring diagram or existing part for the 45602 or RZ045602 number.
• Does this switch require a manual reset if the heater overheads? No, this is an auto reset limit switch. It will automatically re-engage the heating circuit once the temperature falls below the 120F-180F threshold.
• Can this be used as a flame rollout switch? While it monitors temperature, it is specifically designed as a high limit control for the heat exchanger; always verify against your specific furnace’s safety circuit requirements.

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.