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Error code reference

LG Microwave Error Code dE

Divider Missing Error

LG codesLG microwave codes

Divider Missing Error - divider not correctly inserted or detected for the selected cooking mode.

First step from the service manual

Check if divider is inserted; check divider detection switch and connections.

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

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What dE means on a LG microwave

The dE error code on an LG microwave stands for Divider Missing Error. This code is triggered when the microwave's control system expects a physical divider to be present for the selected cooking mode but cannot confirm its correct installation. The divider is a partition component used in certain LG microwave models, particularly combination or multi-zone cooking modes that require the interior cavity to be physically separated. When this component is absent or not seated properly, the unit halts operation and displays dE to prevent cooking from proceeding under the wrong conditions.

The detection system relies on a dedicated divider detection switch, typically a mechanical contact switch positioned to engage when the divider is fully and correctly inserted into its mounting slots. If the divider is missing entirely, inserted at an incorrect angle, or only partially seated, the switch will not close its circuit, and the control board will register the error. Wiring harness issues such as a loose connector, corroded terminal, or broken lead between the switch and the control board can also prevent the signal from reaching the control system, producing the same error even when the divider itself is physically in place.

Diagnosing this error begins with physically verifying the divider is inserted fully into both guide slots until it seats firmly. If the divider is correctly installed and the error persists, the detection switch should be tested for continuity using a multimeter, confirming that it closes properly when the divider is engaged. Inspect the wiring harness from the switch to the control board for damaged insulation, loose connectors, or corrosion. A faulty switch that fails to make contact even when the divider is seated will require replacement. In rare cases, the control board itself may fail to read the switch signal correctly, pointing to a board-level fault.

Source: manufacturer service documentation.

Common causes of dE

  1. 01

    Divider Not Fully Inserted

    Wiring / connection

    The most frequent cause is the divider not being seated completely into its guide slots. Check both sides of the divider and press it firmly into place until it is flush and secure.

  2. 02

    Divider Absent or Missing

    Wiring / connection

    If a cooking mode that requires the divider is selected without the divider present in the cavity, the dE code will immediately appear. Ensure the correct divider accessory is being used for the selected mode.

  3. 03

    Faulty Divider Detection Switch

    Part replacement

    The contact switch that confirms divider placement can wear out or fail to make proper contact even when the divider is correctly installed. Test the switch for continuity with a multimeter; a switch that does not close when the divider engages it needs to be replaced.

  4. 04

    Loose or Damaged Wiring Harness Connection

    Wiring / connection

    A disconnected, corroded, or broken wire between the detection switch and the control board can prevent the installed switch from reporting correctly. Inspect the connector at both the switch and board ends for damage or looseness.

  5. 05

    Control Board Fault

    Part replacement

    If the divider and switch are both confirmed good but the error persists, the control board may not be reading the switch signal correctly, indicating a board-level failure. This is the least common cause and typically identified only after other components have been ruled out.

See the test procedure for each cause

Frequently asked questions about dE

What does dE mean on a LG microwave?
The dE code on an LG microwave means the appliance has detected a Divider Missing Error. It indicates that the microwave cannot confirm the cooking divider is correctly inserted for the mode you have selected. The unit will not proceed with cooking until the divider is detected as properly in place. The issue may involve the divider itself, the detection switch, or the wiring connected to it.
How do I fix the dE error on my LG microwave?
Start by removing and reinserting the cooking divider, making sure it is fully seated in both guide slots on both sides of the cavity. If the error continues after correctly inserting the divider, inspect the divider detection switch and its wiring harness for damage or loose connections. A faulty detection switch will need to be replaced if it does not show continuity when the divider is engaged.
Is it safe to use my LG microwave when the dE error is showing?
You should not attempt to bypass or ignore the dE error. The microwave is designed to prevent operation in specific modes when the divider is not confirmed as correctly installed. Attempting to use a cooking mode that requires the divider without it properly in place could result in uneven or incorrect cooking results and may indicate a sensor fault that should be addressed before continued use.
Will resetting my LG microwave clear the dE error?
A simple power reset, such as unplugging the unit for a minute, is unlikely to permanently clear the dE error because the code is triggered by an active sensor condition rather than a software glitch. If the underlying cause, such as a missing or improperly seated divider, is not corrected, the error will return as soon as the relevant cooking mode is selected. Address the physical cause first, and the error should clear on its own.
How much does it cost to repair a LG microwave dE error?
If the fix is simply reinserting the divider correctly, there is no cost involved. If the divider detection switch has failed and needs replacement, parts and labor costs typically range from around $50 to $150 depending on your location and the service provider. If the issue escalates to a control board replacement, repair costs can range from $150 to $300 or more, at which point comparing the repair cost to unit replacement value is worth considering.

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