GE Refrigerator Error Code EC — Evaporator Coil Temperature Sensor Failure
What this means
The EC error code on GE refrigerators indicates the evaporator coil temperature sensor (thermistor) is sending abnormal readings to the main control board. This sensor monitors how cold the evaporator coils are and determines when defrost cycles should begin and end. A faulty sensor can cause the refrigerator to defrost too often, not defrost at all, or run the compressor continuously.
Step-by-step fix
4 stepsReset the refrigerator
Unplug the refrigerator for 5 minutes and plug it back in. If the EC code was caused by a temporary sensor glitch, the reset will clear it. Monitor for 24 hours.
If the code returns within 24 hours, the sensor has a persistent problem that needs diagnosis.
Access the evaporator temperature sensor
Unplug the refrigerator. Open the freezer and remove the back panel to expose the evaporator coils. The temperature sensor is typically clipped to the evaporator tubing — a small thermistor with two wires.
Do not confuse the evaporator sensor with the defrost thermostat — the sensor has thin wires going back to the control board, while the thermostat has thicker wires connecting to the defrost heater.
Test the sensor with a multimeter
Disconnect the sensor wires and measure resistance. At freezer temperature (around 0 degrees Fahrenheit), the sensor should read approximately 16,000 to 17,000 ohms. At room temperature (75 degrees Fahrenheit), it should read approximately 5,000 to 6,000 ohms. An OL or zero reading indicates failure.
If you test the sensor at room temperature after defrosting, the room-temp spec is the one to use.
Replace the sensor if faulty
Remove the sensor from its clip on the evaporator tubing. Install the new sensor in the same position, reconnect the wires, and reassemble the back panel. Plug in the refrigerator and monitor.
Make sure the new sensor is in firm contact with the evaporator tubing — a loose fit will give inaccurate readings.
When to call a professional
If the sensor tests within spec but the EC code persists, the main control board's thermistor input circuit may be damaged. A technician can test the board and replace it if needed.
Related error codes
Information compiled from manufacturer service manuals, official troubleshooting documentation, and appliance repair industry resources. This guide is for informational purposes only — always consult a qualified technician for complex repairs.
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