Nordyne 626599 Limit Switch

The Nordyne 626599 Limit Switch is a critical safety component designed for inducer motor applications within Nordyne furnace systems and private-label units like Intertherm, Miller, and Frigidaire. This 160F manual reset limit switch is the direct OEM replacement for legacy part numbers 626557 and 626557R. Engineered for high-temperature environments, this manual-reset inducer switch serves as a reliable furnace safety limit, cutting power to the system if the inducer compartment exceeds the 160°F threshold to prevent equipment damage. For field technicians, this L160 inducer limit features standard quick-disconnect spade terminals for a fast install. When you encounter a furnace short cycling or a system that won't ignite, verify if the 626599 limit switch has tripped. Unlike auto-reset models, this unit requires a physical reset, ensuring the contractor can diagnose the underlying airflow restriction or inducer failure before restoring operation.

• Direct OEM Compatibility: Serves as the precise drop-in replacement for 626557 and 626557R, eliminating the need for bracket modifications.
• High-Accuracy Thermal Sensing: Provides a rigid 160°F cutout point to protect inducer motor housings and surrounding furnace components.
• Manual Override Security: The manual reset feature ensures the system cannot restart until a technician validates the safety of the heat exchanger and venting.
• Broad Brand Support: Fits an extensive range of Nordyne-built equipment, including Tappan, Gibson, Philco, and Westinghouse gas furnaces.
• Rugged Construction: Built with high-temperature thermoset plastic to withstand the demanding conditions of the inducer assembly.

How do I know if my Nordyne 626599 needs to be replaced?
If the furnace inducer runs but the burners fail to ignite, or if you find the switch open even after it has cooled down, use a multimeter to check for continuity. If there is no continuity after pressing the manual reset button, the internal bimetal disc or contacts have likely failed.

Will this work in place of an automatic reset switch?
No. In HVACR applications, safety limits should never be downgraded. If your specific furnace model calls for a manual reset limit switch at 160°F, do not substitute it with an auto-reset version, as this could lead to dangerous rapid cycling and component fatigue.

What causes this limit switch to trip frequently?
Frequent tripping of the 626599 often points to a failing inducer motor, a blocked flue vent, or a cracked heat exchanger. It is intended to remain closed under normal operating conditions; a trip is a diagnostic indicator that airflow or combustion gas removal is compromised.

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.