Frigidaire / Electrolux Refrigerator temperature sensor, 10K NTC thermistor 240597203

Temperature sensor/thermistor used to monitor refrigerator temperature and provide readings to the electronic control system. A Frigidaire parts manual identifies 240597203 as “Sensor, temperature, 10K, NTC.”

Is This the Right Part?

Common Symptoms

• Fresh-food compartment not cooling properly
• Refrigerator or freezer temperature displayed inaccurately
• Freezer temperature too warm or too cold
• Excessive frost or ice buildup associated with incorrect temperature sensing
• Compressor running longer than normal or cycling unusually

Check Before Replacing

• Verify actual compartment temperature with an appliance thermometer before replacing the sensor.
• If the refrigerator has a user-accessible diagnostic mode, check the temperature-sensor reading or related open/short error code according to the model’s technical sheet.
• With power disconnected, inspect the sensor connector and visible wiring for looseness, damage, or corrosion.
• Using a multimeter and the model’s technical data, check whether thermistor resistance changes as the surrounding temperature changes; an open circuit or resistance that does not respond to temperature indicates a sensor-circuit problem, but does not by itself prove the sensor is defective.

Pro Tip

Part Details

Key Features

• Frigidaire/Electrolux refrigerator temperature sensor
• 10K-ohm NTC thermistor
• Used to monitor cabinet or evaporator-area temperature, depending on the refrigerator design
• White sensor assembly
• Exact archived part number: 240597203

Installation Notes

• Disconnect electrical power before servicing.
• Access location varies by model; the sensor may be mounted behind the refrigerator air-duct cover or inside the freezer sensor housing.
• Remove only the shelves, drawers, covers, or panels necessary to reach the sensor for the specific model.
• Photograph or note the original sensor position and wire routing before removal.
• Disconnect the wire connector carefully, release the sensor from its mounting point, install the replacement in the same position, and reconnect the harness securely.
• Reinstall all removed covers and storage components before restoring power.

Verified Compatible Models

CFD26SDS0, CFD26WIS0, CFD26WIS1, CFD26WIS3, CFD26WIS4, CFD26WIS5, CFD26WIS6, CFD27SDPS0, CFD27WIPB2, CFD27WIPB3, CFD27WIPS2, CFD27WIPS3, CFD27WIPW2, CFD27WIPW3, CFD28SDQS0

Fitment reminder: Match the complete appliance model number, including suffix or revision where applicable, before ordering.