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Error code reference

LG Refrigerator Error Code Refrigerator Eva sensor failure

Failure of Refrigerator evaporator sensor due to cut or short circuit wire; indicated by all display LEDs on…

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Failure of Refrigerator evaporator sensor due to cut or short circuit wire; indicated by all display LEDs on but Refrigerator temp display off.

First step from the service manual

Inspect connecting wires on the Refrigerator Eva sensor. Press and hold Freeze temp control button and Super freezing button for 1 second or longer to display error.

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

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  • Wiring diagram references and connector pinouts from the OEM service manual
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What Refrigerator Eva sensor failure means on a LG refrigerator

The Refrigerator Eva sensor failure code indicates that the evaporator temperature sensor located in the refrigerator compartment has failed due to either a cut wire or a short circuit in the wiring. This sensor monitors the temperature of the evaporator coil, providing real-time data to the main control board so it can regulate defrost cycles and compressor operation. When this sensor becomes unavailable, the control board loses the ability to accurately manage cooling in the refrigerator section, which can lead to temperature instability or improper defrost behavior.

The failure is identified visually by a specific display pattern: all indicator LEDs on the control panel remain illuminated, but the refrigerator temperature display is turned off. This distinguishes the refrigerator evaporator sensor fault from other error conditions. To manually trigger the error code display, a technician must press and hold the Freeze temp control button and the Super freezing button simultaneously for one second or longer, causing the unit to present the stored fault.

Diagnosis begins with a physical inspection of the wiring connecting the refrigerator evaporator sensor to the main control board. Technicians should check for visible wire damage, pinched insulation, corrosion at connector terminals, or signs of a short circuit. If the wiring appears intact, the sensor itself should be tested for proper resistance values. A sensor that reads open or shorted will need to be replaced along with any damaged wiring harness sections to restore normal operation.

Source: manufacturer service documentation.

Common causes of Refrigerator Eva sensor failure

  1. 01

    Cut or broken sensor wire

    Part replacement

    Physical damage to the wiring connecting the evaporator sensor to the control board is one of the most direct causes of this fault. Inspect the wire harness running to the refrigerator evaporator sensor for any visible breaks, cuts, or fraying.

  2. 02

    Short circuit in the sensor wiring

    Part replacement

    A short circuit can occur when insulation wears away and two wires contact each other or contact a grounded metal surface. This sends an incorrect signal to the control board and triggers the sensor failure code.

  3. 03

    Faulty or failed evaporator sensor

    Part replacement

    The sensor itself can fail internally over time, reading as open or shorted even when the wiring is undamaged. Testing the sensor resistance will confirm whether the component has failed and needs replacement.

  4. 04

    Loose or corroded connector terminals

    Wiring / connection

    Connector pins at the sensor or control board end can become loose, corroded, or contaminated with moisture, interrupting the signal without any visible wire damage. Cleaning and reseating the connector may resolve the fault.

  5. 05

    Control board not receiving sensor signal

    Part replacement

    If the sensor and wiring both test correctly, the issue may lie with the main control board failing to process the sensor input. This is a less common cause and should be evaluated only after the sensor and wiring are confirmed to be in good condition.

See the test procedure for each cause

Frequently asked questions about Refrigerator Eva sensor failure

What does Refrigerator Eva sensor failure mean on a LG refrigerator?
This error indicates that the evaporator temperature sensor in the refrigerator compartment has failed due to a cut or short circuit in the wiring. The sensor is responsible for monitoring evaporator coil temperature so the control board can regulate cooling and defrost cycles. The fault is identified by all display LEDs being on while the refrigerator temperature display is off. A technician can confirm the code by pressing and holding the Freeze temp control and Super freezing buttons simultaneously for one second or more.
Can I fix the Refrigerator Eva sensor failure on my LG refrigerator myself?
A knowledgeable DIYer can start by inspecting the wiring harness connected to the refrigerator evaporator sensor for visible damage or loose connectors. Reseating a loose connector or replacing a damaged wire section is within reach for someone comfortable with basic appliance repair. However, if the sensor itself needs replacement or the issue involves the control board, professional diagnosis is recommended to avoid further damage.
Is it safe to keep using my LG refrigerator when this error is displayed?
Continuing to run the refrigerator with a failed evaporator sensor is not recommended. Without accurate evaporator temperature data, the control board cannot properly regulate defrost cycles or cooling, which can lead to food spoilage or excessive frost buildup. It is best to address the fault promptly to prevent further issues.
How much does it cost to repair a Refrigerator Eva sensor failure on an LG refrigerator?
Repair costs vary depending on whether only the sensor, the wiring harness, or the control board needs to be replaced. A replacement evaporator sensor typically falls in the range of $20 to $60 for the part, while professional labor can add $100 to $250 or more depending on your location and the technician's rates. If wiring harness repairs or a control board replacement are needed, total costs will be higher.
Will resetting my LG refrigerator clear the Refrigerator Eva sensor failure code?
A power reset may temporarily clear the error from the display, but the code will return if the underlying problem with the sensor or wiring has not been resolved. The fault must be diagnosed and repaired for the code to be permanently cleared. Resetting without addressing the root cause can also leave the refrigerator operating without proper temperature monitoring.

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