Nordyne 626355R Limit Switch

When you're troubleshooting a furnace that is short-cycling or hitting a hard lockout, the Nordyne 626355R is the critical safety component you need to verify. As a Genuine OEM Nordyne 240F CO Auto Limit Switch, this part is engineered to monitor heat exchanger temperatures and break the circuit to the burners if the internal plenum temperature reaches its 240?F cut-out threshold. This furnace high limit switch is specifically designed for Nordyne HVAC equipment, including Miller, Intertherm, and Frigidaire brands, ensuring the safety of the heat exchanger by preventing catastrophic overheating. In the field, we see these fail due to restricted airflow from oversized filters or blower motor degradation. Replacing a faulty switch with this OEM replacement part restores the automatic temperature regulation and furnace safety cut-off functionality required for code-compliant operation. If you are seeing an open limit switch error code on the control board, verify your static pressure and temperature rise before swapping this 240F Limit Switch for a seamless, drop-in repair.

• OEM Precision: Genuine Nordyne factory-authorized part ensures exact mounting and thermal response times without the calibration drift often found in generic alternatives.
• System Protection: Precisely calibrated 240-degree Fahrenheit cut-out provides critical protection for the heat exchanger and internal components.
• Universal Compatibility: Direct fit for multiple Nordyne-built brands, reducing the need for field modifications or bracket adjustments.
• Auto-Reset Functionality: Automatically restores the circuit once temperatures return to safe operating levels, reducing nuisance service calls.

What causes this limit switch to trip frequently?
The most common culprits are reduced airflow from a dirty air filter, a failing blower motor, or blocked return/supply vents causing the heat exchanger to exceed the 240?F safety limit.

Is the 626355R a manual or automatic reset?
This is an automatic (Auto) limit switch that will reset itself once the temperature drops below its specific differential set point, unlike manual reset switches that require physical interaction.

Can I use this switch in a non-Nordyne unit?
While electrically compatible with many 24-volt systems, this part is specifically designed for the airflow characteristics and mounting configurations of Nordyne-manufactured furnaces.

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.