Nordyne 626423R Limit Switch

For service calls involving short-cycling or thermal cutout issues in Nordyne-built systems, the Nordyne 626423R Auto Limit Switch is the OEM replacement part required to restore factory safety parameters. This L170-20F limit control is specifically engineered to monitor heat exchanger temperatures, featuring a fixed 170?F open point to interrupt the burner circuit and a 150?F close point for automatic reset. As a fixed-mount furnace safety switch, it provides critical high-limit protection in mobile home furnaces, gas-fired units, and packaged HVAC systems, effectively replacing the legacy number 626423.

The 626423R limit switch is designed for board-mounted applications, ensuring a precise fit within the heat plenum where accurate sensing is vital. Its automatic reset functionality allows the furnace to resume normal operation once internal temperatures fall back to the safe 150?F threshold, eliminating the need for manual intervention after a temporary overheat condition. By maintaining the OEM temperature rise specifications, this control prevents cracked heat exchangers and ensures the long-term reliability of the heating system.

Key Benefits

• Precise Thermal Protection: Features a factory-calibrated 170?F cutout to prevent equipment damage.
• Drop-in OEM Compatibility: Engineered as the direct replacement for Nordyne 626423, ensuring proper electrical and mechanical alignment.
• Automatic System Recovery: Integrated auto-reset technology eliminates service calls for simple nuisance trips.
• Superior Build Quality: Constructed for high-cycle reliability in demanding residential heating environments.

Common Questions

Is the 626423R an exact match for my older 626423 switch?
Yes. The 626423R is the current factory-authorized replacement for part number 626423. It maintains the same 150-170 degree temperature range and mounting footprint.

Why is my furnace blower running constantly while the burners are off?
This often indicates that the high limit switch has opened. If the switch detects temperatures exceeding 170?F, it cuts power to the gas valve while keeping the blower energized to cool the heat exchanger.

Can I use this limit switch in other furnace brands?
While technically a temperature-actuated switch, this model is specifically a Nordyne OEM part used in Intertherm, Miller, and Broan equipment. Always verify the temperature rating and mounting style before installation in non-Nordyne units.

Important Notice

?? California Proposition 65 Warning: This product may expose you to chemicals known to the State of California to cause cancer and reproductive harm.

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.