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Error code reference

LG Refrigerator Error Code Error11

Ice maker sensor abnormal

LG codesLG refrigerator codes

Ice maker sensor abnormal - short circuit or open circuit.

First step from the service manual

Check resistance at both ends of ice maker sensor at CON8 PIN 1,2.

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

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What Error11 means on a LG refrigerator

Error11 on an LG refrigerator indicates an abnormality in the ice maker sensor circuit. Specifically, the control board has detected either a short circuit or an open circuit condition in the ice maker temperature sensor (thermistor). This sensor monitors the temperature inside the ice maker assembly to regulate the ice-making cycle. When the sensor circuit falls outside the expected resistance range, the board flags the fault and may halt ice production to prevent damage or unsafe operation.

The ice maker sensor is a negative temperature coefficient (NTC) thermistor, meaning its resistance decreases as temperature rises. The primary diagnostic step is to measure the resistance at CON8 PIN 1 and PIN 2 on the connector, which are the two terminals feeding the sensor signal back to the main control board. A short circuit will typically read near 0 ohms, while an open circuit will read infinite or unmeasurable resistance. Either condition falls outside normal operating resistance and triggers Error11.

Common causes include a failed thermistor with an internal break or short, damaged wiring in the harness between the sensor and CON8, or a corroded or loose connector at CON8. In some cases, moisture intrusion into the ice maker compartment can cause connector corrosion or wire insulation breakdown. The control board itself can also be a factor if the CON8 input circuit is damaged, though this is less common and should only be suspected after the sensor and wiring have been confirmed good.

Source: manufacturer service documentation.

Common causes of Error11

  1. 01

    Failed ice maker thermistor

    Part replacement

    The thermistor itself has developed an internal open or short circuit, causing an out-of-range resistance reading at CON8 PIN 1 and PIN 2. This is the most frequent cause and is confirmed by measuring resistance directly at the sensor terminals.

  2. 02

    Damaged or broken wiring harness

    Part replacement

    The wire harness connecting the ice maker sensor to CON8 can develop breaks, shorts, or insulation damage, especially near stress points or zip tie locations. Visually inspect the harness and perform a continuity check along the full length of each wire.

  3. 03

    Corroded or loose connector at CON8

    Wiring / connection

    Moisture in the ice maker area can lead to corrosion on the connector pins at CON8, causing poor contact and a false open or short circuit reading. Inspect the connector for discoloration, oxidation, or pins that are not fully seated.

  4. 04

    Moisture intrusion causing short circuit

    Wiring / connection

    Water leaking into the ice maker compartment can bridge sensor wiring or connector pins, creating a short circuit condition. Check for ice buildup or water trails near the sensor wiring and CON8 connector.

  5. 05

    Faulty main control board

    Part replacement

    If the sensor, wiring, and connector all test within normal parameters, the CON8 input circuit on the main control board may be damaged. This is the least likely cause and should only be considered after all other components have been ruled out.

See the test procedure for each cause

Frequently asked questions about Error11

What does Error11 mean on a LG refrigerator?
Error11 on an LG refrigerator indicates that the ice maker temperature sensor has been detected in an abnormal state, either a short circuit or an open circuit. The control board monitors the sensor through CON8 PIN 1 and PIN 2, and when the resistance falls outside the acceptable range, the error is triggered. This typically stops normal ice maker operation until the fault is resolved.
How do I fix Error11 on my LG refrigerator?
Begin by measuring the resistance at CON8 PIN 1 and PIN 2 to determine whether the sensor circuit shows a short (near 0 ohms) or an open (infinite resistance). If the resistance is abnormal, inspect the wiring harness and connector for damage or corrosion before replacing the ice maker thermistor. If the sensor and wiring test good, the main control board may need further evaluation.
Will resetting my LG refrigerator clear Error11?
A power reset may temporarily clear the error code from the display, but if the underlying sensor fault still exists, Error11 will return. The error code indicates an active circuit fault that requires diagnosis and physical repair. Resetting without fixing the cause is not a permanent solution.
Is it safe to use my LG refrigerator while Error11 is displayed?
The refrigerator's cooling and food preservation functions typically continue to operate even when Error11 is active, since the fault is specific to the ice maker sensor circuit. However, ice production will likely be suspended or unreliable. It is safe to continue using the refrigerator for food storage, but the ice maker should not be expected to function normally until the sensor issue is repaired.
How much does it cost to repair LG refrigerator Error11?
If only the ice maker thermistor needs replacement, parts typically cost between $10 and $40, and the repair is relatively straightforward. If wiring harness repair or connector replacement is needed, labor costs will vary by service provider. A main control board replacement, if required, can range from $100 to $300 or more for parts alone, making it the most expensive possible outcome for this error.

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