Nordyne 626404R Limit Switch

The Nordyne 626404R is a critical OEM replacement part engineered for high-limit safety in Intertherm, Miller, and Revolv gas and electric furnaces. As a 145F double pole limit switch, this component is designed to monitor internal plenum temperatures and interrupt both sides of the electrical circuit should the system exceed the 145-degree Fahrenheit threshold. This rollout limit switch features an automatic reset with a 40-degree differential, meaning the circuit will re-close once the temperature drops back to 105°F, provided the underlying airflow issue is resolved.

For service technicians, the 626404R provides a direct replacement for 6262610, as well as several legacy part numbers including 626261, 208439, and 626334. The double pole single throw (DPST) configuration ensures robust safety by breaking the path for two separate heating elements or lines simultaneously, which is standard for Nordyne FEH and CME series electric furnaces. This 64TX11 size switch fits the standard mounting footprint, allowing for a seamless swap-out during emergency service calls without the need for manifold or bracket modifications.

• Precise Thermal Protection: Factory-calibrated to open at 145°F (L145-40F) to prevent heat exchanger damage and rollout hazards.
• Broad Compatibility: Serves as the primary Nordyne furnace limit switch for several mobile home and residential HVAC platforms.
• OEM Standards: Built to Nordyne/Intertherm specifications to ensure correct snap-action response and terminal alignment.
• Double-Pole Security: Enhances circuit safety by managing two separate contact points, essential for multi-element electric heat strips.

Is the 626404R the same as the 6262610?
Yes, the 626404R is the current manufacturer-approved direct replacement for the discontinued 6262610 limit switch.

What causes this limit switch to trip repeatedly?
While the switch itself can wear out, frequent tripping usually indicates an airflow restriction. Check for a clogged air filter, blocked return grilles, or a failing blower motor before replacing the switch.

How do I test the 626404R for continuity?
With power disconnected and the switch at room temperature, use a multimeter set to ohms. You should read 0.0 ohms (continuity) across the terminals because this is a normally closed (NC) safety device.

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.