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Error code reference

Electrolux Washer Error Code 87

User interface micro-controller fault.

Electrolux codesElectrolux washer codes

User interface micro-controller fault.

First step from the service manual

Refer to test (11) - Check wiring between main control board and user interface board.

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

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What 87 means on a Electrolux washer

Error code 87 on an Electrolux washer indicates a fault detected in the user interface micro-controller. The user interface board is the control panel assembly that processes input from the user, such as cycle selections and button presses, and communicates those commands to the main control board. When the main control board cannot establish or maintain proper communication with the user interface micro-controller, it triggers this fault code and halts washer operation to prevent unpredictable behavior.

The most common root cause of this error is a wiring or connection issue between the main control board and the user interface board. Loose connectors, damaged wiring harness segments, or corroded terminals can interrupt the communication signal between the two boards. Physical inspection of the wiring harness and connectors at both ends is the required first diagnostic step, as this is the most frequently overlooked and easiest-to-resolve source of the fault.

If the wiring and connectors check out as intact and secure, the fault may point to a failure within the user interface board itself, specifically its micro-controller circuit. In some cases, the main control board may also be responsible if it is not correctly driving the communication line. Determining which component has failed requires systematic testing of the circuit per the diagnostic test 11 procedure, which evaluates the wiring path and signal integrity between the two boards.

Source: manufacturer service documentation.

Common causes of 87

  1. 01

    Loose or disconnected wiring harness connector

    Wiring / connection

    The connector linking the main control board to the user interface board may have worked loose over time due to vibration. Inspect both ends of the harness for fully seated, locked connectors.

  2. 02

    Damaged or pinched wiring harness

    Part replacement

    The wiring between the two boards can become pinched, frayed, or broken, especially near routing points or cabinet edges. Visually trace the full length of the harness and check for visible damage or broken conductors.

  3. 03

    Corroded or oxidized connector terminals

    Wiring / connection

    Moisture exposure inside the cabinet can cause terminal corrosion at the harness connectors, increasing resistance and disrupting communication. Look for green or white oxidation on the metal terminals at each connector.

  4. 04

    Failed user interface board

    Part replacement

    If wiring checks out as intact, the micro-controller circuit on the user interface board itself may have failed. This requires replacing the user interface board assembly.

  5. 05

    Faulty main control board

    Part replacement

    In less common cases, the main control board may be unable to properly drive or read the communication line, producing a false fault 87. This is typically suspected only after the wiring and user interface board have been ruled out.

See the test procedure for each cause

Frequently asked questions about 87

What does 87 mean on a Electrolux washer?
Error code 87 indicates a user interface micro-controller fault. The main control board has detected a failure in communication with the user interface board, which is the panel you use to select wash cycles and settings. The washer will not operate until this fault is resolved.
Can I fix error code 87 on my Electrolux washer myself?
Some causes of error 87 are DIY-friendly, such as reseating a loose wiring harness connector or cleaning corroded terminals. However, if the user interface board or main control board requires replacement, the repair involves handling sensitive electronics and disassembling the machine, which may be better suited for a qualified technician. Always unplug the washer before inspecting any internal components.
Is it safe to use my Electrolux washer when error 87 is showing?
No, you should not attempt to run the washer while error 87 is active. The fault indicates a breakdown in communication between critical control components, and operating the machine in this state could lead to incorrect cycle behavior or further damage to electronics.
Will resetting my Electrolux washer clear error code 87?
A power reset by unplugging the washer for a few minutes may temporarily clear the code, but if the underlying wiring or component fault is still present, the error will return. A reset is not a fix and should not be relied on as a long-term solution. The wiring between the main control board and user interface board needs to be inspected per diagnostic test 11.
How much does it cost to repair error code 87 on an Electrolux washer?
Repair costs depend on the root cause. If the issue is a loose connector, the repair may cost little to nothing beyond your time. Replacing a user interface board typically runs between $100 and $250 for the part alone, with additional labor costs if a technician is needed. A main control board replacement can range from $150 to $350 or more for the part.

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