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Error code reference

LG Refrigerator Error Code Er dS

Defrost sensor error caused by short or disconnection of the defrost sensor (listed as pantry sensor in error…

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Defrost sensor error caused by short or disconnection of the defrost sensor (listed as pantry sensor in error table).

First step from the service manual

Check for a loose connection at CON7 pins 19 & 20, then check sensor resistance.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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What Er dS means on a LG refrigerator

The Er dS code on an LG refrigerator indicates the control board has detected a fault in the defrosting sensor circuit. Specifically, the board is reading either a short circuit or an open circuit (disconnection) from the defrosting sensor, which monitors temperatures during the defrost cycle. When the sensor signal falls outside the expected range or disappears entirely, the board logs this fault and displays Er dS. The defrosting sensor is a thermistor-type component mounted near the evaporator coil.

In practical terms, the defrost sensor tells your refrigerator when the evaporator coil has reached the correct temperature during the automatic defrost cycle. If this sensor fails or loses its connection, the refrigerator cannot reliably manage defrost, which can lead to frost buildup on the evaporator coil over time. Left uncorrected, excessive frost buildup will restrict airflow and cause the refrigerator to lose cooling efficiency.

This error is triggered by one of two electrical conditions: a short in the sensor circuit, where two conductors make unintended contact, or a disconnection, where the circuit is broken entirely. Both conditions produce a signal the control board cannot interpret as a valid temperature reading, causing the Er dS fault to appear.

Source: manufacturer service documentation.

Common causes of Er dS

  1. 01

    Disconnected defrosting sensor wiring harness

    Wiring / connection

    The wiring connector linking the defrosting sensor to the main control board can work loose over time, especially during servicing or due to vibration. A disconnected harness produces an open circuit that immediately triggers Er dS.

  2. 02

    Failed defrosting sensor (thermistor)

    Part replacement

    The defrosting sensor itself can fail internally, producing either a short circuit or an open circuit within the thermistor element. A failed sensor must be replaced to restore a valid temperature signal to the control board.

  3. 03

    Damaged or shorted sensor wiring

    Part replacement

    The wiring between the defrosting sensor and the control board can develop a short or break due to chafing, pinching, or frost damage. Damaged wire insulation can allow conductors to contact each other or the refrigerator chassis, creating a short-circuit condition.

  4. 04

    Faulty main control board

    Part replacement

    If the sensor and wiring both test within spec, the main control board may be misreading or failing to process the sensor signal correctly. This is the least common cause and should only be suspected after the sensor and wiring have been verified.

See the test procedure for each cause

Frequently asked questions about Er dS

What does Er dS mean on an LG refrigerator?
Er dS indicates a defrosting sensor error. The control board has detected either a short circuit or a disconnection in the defrosting sensor circuit. The defrosting sensor is a thermistor mounted near the evaporator coil that monitors temperatures during the automatic defrost cycle. The code appears when the sensor's signal is outside the range the board considers a valid temperature reading.
How do I fix Er dS on my LG refrigerator?
Start by unplugging the refrigerator, locating the defrosting sensor near the evaporator coil (typically behind the rear panel inside the freezer compartment), and checking whether the wiring harness connector is fully seated. Reconnect any loose connector and restore power to see if the code clears. If the code returns, use a multimeter to test the sensor's resistance and compare it against LG's specified range for the part number in your model. A sensor reading open or shorted requires replacement of the defrosting sensor.
Can I still use my LG refrigerator when it shows Er dS?
The refrigerator will likely continue to cool in the short term, but the defrost cycle cannot operate reliably without a functioning defrosting sensor. Over time, frost will accumulate on the evaporator coil, restrict airflow, and cause the unit to lose cooling performance. Continued use without repair risks food spoilage and potential compressor strain, so the issue should be addressed promptly rather than ignored.
How much does it cost to fix an Er dS error on an LG refrigerator?
If the fix is simply reseating a disconnected wiring harness, there is no parts cost. A replacement defrosting sensor thermistor for LG refrigerators typically costs between $15 and $40 for the part. If you hire a technician, expect a service call fee plus labor, which commonly brings the total to $100 to $200 depending on your region. The sensor itself is a DIY-accessible repair for anyone comfortable working inside the freezer compartment.
Will unplugging my LG refrigerator clear the Er dS code?
Unplugging the refrigerator may temporarily clear the display, but the code will return if the underlying sensor fault is still present. Er dS reflects a real electrical condition in the defrosting sensor circuit, not a software glitch. A reset does not repair a failed sensor or a broken wire, so the code should be addressed through the wiring and sensor checks described above.

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