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Error code reference

Electrolux Washer Error Code E91

Communication error between main control board and display board; UI board defective, main control board defective, or wiring defective.

Electrolux codesElectrolux washer codes
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What the E91 error code actually means

Your Electrolux washer is displaying E91 because the main computer board and the display panel board have stopped communicating with each other. This is similar to two parts of the machine losing their ability to send and receive signals. The washer shuts down to prevent errors, and the issue is usually a loose wire connection, a faulty display board, or less commonly a failed main control board.

Diagnostic procedure

The full E91 procedure

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1
First diagnostic step
Disconnect the connector J19 which connects Electronic Control Board and User Interface Board and check if the alarm appears again.
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Most common causes of E91

Ranked by how often they cause this code
  1. 1Loose or corroded connector J19
  2. 2Damaged wiring harness between boards
  3. 3Defective user interface (UI) board
  4. 4Defective main electronic control board

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Questions people ask about E91

What does E91 mean on a Electrolux washer?
E91 on an Electrolux washer indicates a communication error between the main electronic control board and the user interface display board. The two boards communicate through a wiring harness connected at connector J19, and a fault anywhere in that circuit triggers this code. The cause may be a loose or damaged connector, a defective UI board, or a faulty main control board.
Will resetting the washer clear the E91 error code?
A power reset may temporarily clear the E91 code, but if an underlying wiring or board fault exists, the error will return once the machine attempts communication between the two boards again. A reset alone is not a fix and should only be used to confirm whether the fault is intermittent or persistent. Persistent reappearance of the code means the root cause must be addressed.
How much does it cost to repair an Electrolux washer with an E91 error?
Repair costs depend on which component is at fault. If only the connector or wiring harness needs attention, costs may be minimal, primarily covering a service call in the range of $75 to $150. A replacement user interface board typically adds $100 to $250 in parts, while a main control board can range from $150 to $350 or more. Total repair costs including labor generally fall between $150 and $500 depending on the failed component and local labor rates.
Can I fix the E91 error myself without replacing parts?
In some cases, yes. The first step is to disconnect connector J19, which links the electronic control board and the UI board, and check whether the alarm reappears after reconnecting it. If the connector was loose or had a poor seating, reseating it firmly may resolve the error. If the fault persists after checking and reseating the connector and inspecting the wiring harness for visible damage, a board replacement is likely required.
Is it safe to use my Electrolux washer while E91 is displayed?
No, you should not continue running the washer while E91 is active. The error indicates a communication breakdown between control components, meaning the machine cannot reliably execute or monitor its programmed cycles. Running the washer in this condition could result in incorrect operation, incomplete cycles, or potential damage to the appliance or laundry.

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