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Error code reference

Electrolux Washer Error Code 98

Incompatible motor control/main board.

Electrolux codesElectrolux washer codes

Incompatible motor control/main board.

First step from the service manual

Refer to test (10) - Check wiring between main control board and motor control board.

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

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What 98 means on a Electrolux washer

Error code 98 on an Electrolux washer indicates an incompatibility detected between the motor control board and the main control board. These two boards communicate continuously during operation, exchanging data about motor speed, load, and command signals. When the washer's main control board cannot establish proper communication with the motor control board, or detects that the installed motor control board does not match the expected firmware or hardware configuration, it triggers error code 98 and halts operation to prevent damage.

The most common scenario that produces this error is a recent replacement of either the main control board or the motor control board with a unit that is not the correct version for the machine. Even boards that appear physically identical may carry different firmware revisions that are not cross-compatible. This incompatibility can also arise from a failed or corrupted board that is no longer responding correctly over the communication circuit between the two modules.

Diagnostic work should begin with test 10, which involves inspecting the wiring harness running between the main control board and the motor control board. A damaged, loose, or corroded connector in this wiring path can mimic a true incompatibility by interrupting the communication signal. After confirming the wiring is intact and connections are secure, the technician should verify that both boards are the correct, matched versions for the specific washer model before proceeding to board replacement.

Source: manufacturer service documentation.

Common causes of 98

  1. 01

    Mismatched replacement board installed

    Part replacement

    If either the main control board or the motor control board was recently replaced, the new board may carry a different firmware version or hardware revision that is incompatible with the existing board. Confirm both boards are the correct matched versions for the exact washer model.

  2. 02

    Loose or disconnected wiring between boards

    Wiring / connection

    A loose, unplugged, or damaged connector in the harness between the main control board and the motor control board can interrupt communication and trigger this code. Inspect the harness and all connectors along this circuit as the first step.

  3. 03

    Corroded or damaged wiring harness

    Wiring / connection

    Corrosion at connector pins or physical damage to the wiring between the two boards can degrade the communication signal enough to register as incompatibility. Look for discoloration, bent pins, or melted insulation along the harness route.

  4. 04

    Failed motor control board

    Part replacement

    A motor control board that has failed internally may no longer respond correctly to the main board, causing the system to report incompatibility even if the boards are the correct matched pair. If wiring checks out and boards are confirmed correct, the motor control board should be tested for proper function.

  5. 05

    Failed main control board

    Part replacement

    A corrupted or malfunctioning main control board can misread or fail to recognize a functioning motor control board. This is less common than a motor control board failure but should be considered if all other causes have been eliminated.

See the test procedure for each cause

Frequently asked questions about 98

What does 98 mean on a Electrolux washer?
Error code 98 means the washer has detected an incompatibility between the main control board and the motor control board. These two boards must be matched versions to communicate correctly, and if they are mismatched or if the wiring between them is faulty, the machine will stop and display this code. The washer will not operate until the incompatibility is resolved.
Can I fix error code 98 on my Electrolux washer myself?
A knowledgeable DIYer can start by inspecting the wiring harness between the main control board and the motor control board for loose connectors, damaged wires, or corrosion. If a board was recently replaced, verifying that the correct version was installed is an important next step. However, if the wiring is intact and a board replacement is needed, working with control boards requires care to avoid electrostatic damage and to ensure correct part matching.
Will resetting my Electrolux washer clear error code 98?
A simple power reset is unlikely to permanently clear error code 98 because the condition it flags, a hardware or firmware incompatibility between the two control boards, is not resolved by cycling power. The code may temporarily disappear but will return as soon as the washer attempts to operate and the boards fail to communicate correctly. The underlying cause must be corrected first.
Is it safe to use my Electrolux washer when error code 98 is showing?
The washer is designed to halt operation when this error is detected, so it will typically not run a cycle while code 98 is active. Attempting to force operation is not recommended, as a malfunctioning motor control circuit could cause unpredictable motor behavior. The machine should be left unplugged until the cause is diagnosed and corrected.
How much does it cost to repair error code 98 on an Electrolux washer?
If the fix is simply reseating a loose connector or replacing a damaged wiring harness, repair costs are generally low, typically in the range of $50 to $150 including labor. If a motor control board replacement is needed, parts alone can range from $100 to $300 or more depending on the model, with additional labor costs if a technician is hired. Main control board replacements tend to fall in a similar price range.

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