Nordyne 626487R Limit Switch

The Nordyne 626487R Limit Switch is a critical OEM replacement part designed for high-limit temperature protection in Nordyne, Intertherm, and Miller furnaces. This single-pole, manual reset limit switch is engineered to open the electrical circuit when internal plenum temperatures reach 190°F, preventing heat exchanger damage and ensuring system safety. As a direct replacement for the legacy 626459 limit switch, the 626487R features a standardized L190-50 configuration, meaning it trips at 190°F and can be manually reset once the temperature drops back to 140°F. This specific 140-190F limit switch is commonly found in E2EB and E2EH electric furnace series, particularly 15kW and 17kW models, as well as various gas-fired units. For technicians performing furnace troubleshooting, this component is essential for resolving rollout issues and HVAC safety switch failures that prevent the heating cycle from initiating. Professionals should always verify the specific temperature footprint and terminal orientation before installation to maintain original equipment specifications.

• Precise Thermal Protection: Verified 190-degree opening point specifically calibrated to protect Nordyne and Miller heat exchangers from over-temperature conditions.
• Manual Reset Safety: Requires a physical reset at 140°F, ensuring technicians can diagnose the cause of the trip—such as a failed blower motor or restricted airflow—before the system continues operation.
• Broad Compatibility: Serving as the 626459 replacement, this Nordyne furnace part fits a wide range of mobile home and residential HVAC equipment, simplifying truck stock requirements.
• Durable OEM Construction: Built to withstand the high-cycle demands of electric furnace limit applications with high-grade electrical contacts and a robust housing.

Is the 626487R a direct replacement for part 626459?
Yes, the 626487R is the official manufacturer-designated supersession for the 626459. It maintains the same 140-190°F temperature range and mounting footprint.

Why does this switch require a manual reset?
A manual reset is a safety design feature. If a high limit switch trips, it usually indicates a significant airflow or combustion issue. The manual button ensures the system remains offline until a qualified contractor inspects the unit.

Will this work in both gas and electric Nordyne furnaces?
Yes, this limit switch is used across various platforms, including Miller E2EB series electric furnaces and certain gas-fired units, provided the 190°F limit rating matches the original specification.

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.