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Error code reference

LG Refrigerator Error Code Er IM Tray

Abnormal F Room icemaker tray sensor

LG codesLG refrigerator codes

Abnormal F Room icemaker tray sensor - icemaker tray sensor short or open circuit.

First step from the service manual

Check sensor at its connector.

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

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What Er IM Tray means on a LG refrigerator

The Er IM Tray error code on an LG refrigerator indicates an abnormal condition detected in the F Room (Freezer Room) icemaker tray sensor circuit. This sensor is a thermistor that monitors the temperature of the ice tray during the freeze and harvest cycles. When the refrigerator's control board reads a resistance value outside the expected range for the tray sensor, it flags this fault code. A short circuit condition means the resistance has dropped too low, while an open circuit means the resistance has gone too high or the electrical path has been completely interrupted.

The icemaker tray sensor plays a critical role in timing the ice harvest cycle. The control board uses its readings to determine when the ice in the tray has frozen sufficiently and when to activate the heater and ejector motor to release the cubes. If this sensor is sending an abnormal signal or no signal at all, the icemaker cannot complete its cycle reliably, and ice production will stop.

The first diagnostic step is to inspect the sensor at its connector. This means checking for physical damage to the connector, corrosion on the terminals, bent or pushed-back pins, and any visible damage to the sensor wiring harness. After a visual inspection, a multimeter can be used to measure the resistance across the sensor terminals and compare it to the expected thermistor resistance curve for the operating temperature. A reading of zero ohms indicates a short, while infinite resistance confirms an open circuit in the sensor or its wiring.

Source: manufacturer service documentation.

Common causes of Er IM Tray

  1. 01

    Damaged or Disconnected Sensor Connector

    Wiring / connection

    The wiring connector at the icemaker tray sensor may have come loose, corroded, or been damaged, causing an open or intermittent circuit. Inspecting and reseating the connector is always the first step.

  2. 02

    Failed Icemaker Tray Thermistor

    Part replacement

    The thermistor itself can fail internally, resulting in a short or open circuit condition. Testing the sensor with a multimeter will show either zero ohms (short) or no continuity (open), confirming the sensor needs replacement.

  3. 03

    Damaged Wiring Harness

    Part replacement

    The wire harness running from the control board to the tray sensor can become pinched, broken, or chafed over time, particularly in areas subject to ice buildup or repeated freezing and thawing. Visual inspection of the full harness length can reveal breaks or damage.

  4. 04

    Frost or Ice Buildup Around the Sensor

    Wiring / connection

    Excessive frost accumulation around the icemaker assembly can physically damage the sensor or its wiring, or interfere with its readings. Defrosting the icemaker compartment fully and then retesting may resolve the issue if no permanent damage occurred.

  5. 05

    Faulty Icemaker Control Board

    Part replacement

    If the sensor and all wiring test within normal specifications, the icemaker control board itself may be misreading the sensor signal due to an internal failure. This is a less common cause and should only be considered after the sensor and wiring have been ruled out.

See the test procedure for each cause

Frequently asked questions about Er IM Tray

What does Er IM Tray mean on a LG refrigerator?
Er IM Tray indicates that the LG refrigerator's control system has detected an abnormal signal from the icemaker tray sensor in the freezer compartment. The fault is triggered by either a short circuit (resistance too low) or an open circuit (resistance too high or no continuity) in the sensor or its wiring. As a result, the icemaker cannot properly monitor ice tray temperature and will typically stop producing ice. Diagnosing the issue starts with checking the sensor connector for damage or poor contact.
Can I fix the Er IM Tray error myself?
A knowledgeable DIYer can often resolve this error by inspecting and reseating the icemaker tray sensor connector, which requires no special tools. If the connector looks fine, using a multimeter to test the thermistor's resistance will confirm whether the sensor has failed and needs to be replaced. Wiring harness repairs or control board replacements are more advanced tasks that may be better suited for a qualified technician.
Will resetting my LG refrigerator clear the Er IM Tray code?
A reset may temporarily clear the code, but it will return if the underlying fault in the tray sensor circuit has not been corrected. To permanently resolve the error, the faulty component, whether the sensor, connector, or wiring, must be identified and repaired or replaced. Resetting without addressing the root cause will not restore normal icemaker operation.
Is it safe to continue using my refrigerator with the Er IM Tray code active?
The refrigerator's cooling and food preservation functions are generally not affected by this error, so food safety is not an immediate concern. However, the icemaker will likely be non-functional or unreliable while the fault is active. It is best to address the issue promptly to restore full icemaker operation and prevent any further wear on related components.
How much does it cost to repair the Er IM Tray error on an LG refrigerator?
If the repair only requires reseating a connector, the cost can be minimal or nothing beyond the time spent. Replacing an icemaker tray thermistor sensor typically involves parts costs in the range of $15 to $50 depending on the specific model. If the full icemaker assembly or control board needs replacement, costs can range from $100 to $300 or more for parts and labor combined.

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