Nordyne 626488R Defrost Sensor

When you're troubleshooting a frozen outdoor coil, the Nordyne 626488R Defrost Sensor is a primary suspect. This OEM L68-38F defrost thermostat is engineered to monitor surface temperatures on the evaporator coil, initiating the defrost cycle precisely when frost accumulation impedes heat transfer. Designed for a wide range of Nordyne, Intertherm, and Miller heat pumps, this clipped sensor mounts directly onto 3/8-inch OD tubing. The L68-38F temperature rating signifies a "Close" temperature at approximately 38°F and an "Open" or termination temperature around 68°F, ensuring the reversing valve shifts and the outdoor fan cycles off long enough to clear the fins without overheating the refrigerant circuit. As a drop-in replacement for the 626488 sensor, this unit features a heavy-duty moisture-resistant seal for reliable performance in harsh winter conditions. Field-testing this component involves verifying continuity when the coil temperature drops below the 38°F threshold. If the sensor remains open during heavy frost, the system fails to enter defrost mode, leading to efficiency loss and potential compressor damage. Integrating this 626488R defrost control sensor restores original equipment timing and termination sequences.

• Precise Defrost Initiation: Calibrated L68-38F settings prevent premature or delayed cycling.
• OEM Compatibility: Exact fit for Nordyne, Intertherm, Miller, and Broan heat pumps.
• Tubing Mount Design: Features an integrated clip for secure attachment to 3/8" copper liquid lines.
• Diagnostic Accuracy: Eliminates ghost faults on the defrost control board caused by faulty thermistor readings.
• Durable Lead Wires: Includes factory-terminated connectors for a fast, secure electrical interface.

How do I test if the 626488R sensor is bad?
With the power off, disconnect the sensor leads and check for continuity. If the coil is heavily frosted/iced (below 38°F) and you read infinite resistance (OL), the sensor has failed to close and must be replaced.

Where should this sensor be located on the coil?
The sensor should be clipped to the lowest circuit of the outdoor coil or the specific location indicated in the manufacturer's service manual, as this is typically the first area to frost.

Will this sensor work with other brands like Goodman or Carrier?
This is an OEM Nordyne part. While some defrost sensors share similar footprints, the temperature curves (L68-38F) are specific to the Nordyne defrost board logic. Always match the temperature rating to ensure proper termination.

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.