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Error code reference

LG Refrigerator Error Code tE

Wash heating error

LG codesLG refrigerator codes

Wash heating error - thermistor or heater malfunction during wash cycle.

First step from the service manual

Check if the thermistor connector is properly connected or has poor contact.

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

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What tE means on a LG refrigerator

The tE error code on an LG refrigerator indicates a wash heating error, meaning the control board has detected a malfunction in the thermistor or heater during the wash cycle. The wash cycle is a self-cleaning function within the refrigerator's defrost or ice-related system, and the control board continuously monitors temperature through the thermistor to confirm that heating is occurring as expected. When the sensed temperature falls outside the anticipated range during this cycle, the tE code is triggered.

The thermistor is a temperature-sensing resistor that feeds real-time data to the main control board. If the thermistor has a poor connection, is damaged, or has drifted out of its correct resistance range, the board cannot accurately confirm wash cycle heating. Similarly, if the wash heater itself has failed or has a broken circuit, the cycle cannot complete and the error is logged. Connector issues, including corrosion, looseness, or wire damage at the thermistor plug, are a common starting point for diagnosis.

Diagnosis should begin by inspecting the thermistor connector for secure contact and signs of corrosion or pin damage. If the connector checks out, the thermistor's resistance should be tested and compared against spec. If the thermistor is within range, the wash heater itself should be tested for continuity. A failed heater with an open circuit will require part replacement to resolve the fault.

Source: manufacturer service documentation.

Common causes of tE

  1. 01

    Loose or corroded thermistor connector

    Wiring / connection

    A poor connection at the thermistor plug is the most frequent cause of the tE code. Inspect the connector for looseness, bent pins, or corrosion and reseat it firmly.

  2. 02

    Failed thermistor

    Part replacement

    If the thermistor has failed or its resistance has drifted out of the correct range, the control board cannot accurately read wash cycle temperatures. Testing the thermistor with a multimeter will confirm whether it needs replacement.

  3. 03

    Defective wash heater

    Part replacement

    The wash heater itself may have an open circuit or have burned out, preventing any heating during the wash cycle. A continuity test on the heater will identify a failed unit.

  4. 04

    Damaged wiring between thermistor and control board

    Wiring / connection

    Wiring harness damage, such as fraying or a broken wire, can interrupt the signal between the thermistor and the control board. Visually trace the wiring and test for continuity along the circuit.

  5. 05

    Main control board fault

    Part replacement

    If the thermistor, heater, and wiring all test correctly, a faulty main control board may be misreading or failing to send the correct signal. This is the least common cause and should only be considered after all other components are confirmed good.

See the test procedure for each cause

Frequently asked questions about tE

What does tE mean on a LG refrigerator?
The tE code on an LG refrigerator indicates a wash heating error, meaning the control board detected a problem with the thermistor or heater during the wash cycle. The system uses a thermistor to monitor temperature during this internal cleaning process, and the code appears when that temperature data is outside the expected range. This can be caused by a loose connector, a faulty thermistor, or a failed wash heater.
Can I fix the tE error on my LG refrigerator myself?
Some causes of the tE error are DIY-friendly, such as reseating a loose thermistor connector or inspecting wiring for visible damage. However, testing component resistance and continuity requires a multimeter and basic electrical knowledge. Replacing the heater or thermistor is more involved and may be best handled by a qualified technician if you are not comfortable working with refrigerator components.
Will resetting my LG refrigerator clear the tE error code?
A power reset may temporarily clear the tE code, but if the underlying problem with the thermistor or wash heater is not resolved, the code will return. Resetting is useful for confirming whether the fault is intermittent, such as a loose connector that reseats itself, but it is not a permanent fix. The root cause needs to be diagnosed and corrected.
Is it safe to use my LG refrigerator while the tE code is showing?
The tE error relates to the wash cycle heating function rather than the primary refrigeration or freezing system, so the refrigerator may continue to cool food in the short term. However, leaving the fault unresolved can affect the long-term performance of related systems. It is best to address the error promptly rather than continuing to operate the unit with a known malfunction.
How much does it cost to repair a tE error on an LG refrigerator?
Repair costs depend on which component has failed. Thermistor replacement parts typically fall in a lower price range, while wash heater or control board replacements can cost more for parts alone. Adding professional labor, total repair costs can range from around $100 to $350 or more depending on the specific fault and your location. Getting a diagnostic estimate from a technician before committing to repairs is recommended.

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