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F6E3

F6E3 — Communication Error: ACU Cannot Hear UI

Whirlpool · Cabrio Washing Machines

What does F6E3 mean?

This fault is displayed when communication between the Analog Control Unit (ACU) and the User Interface (UI) has not been detected. This means the main control board is not receiving signals from the user interface.

Common Causes

  • Loose or damaged UI harness connection.
  • Faulty user interface (UI) board.
  • Faulty analog control unit (ACU) or main control board.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Unplug the washer and carefully check the continuity and secure fit of the UI harness connections.

  2. 2

    Ensure all wire harness connections between the ACU and UI are firmly attached.

  3. 3

    Refer to Test #1: Main Control (page 6-5) and Test #4: Keys and Encoders (page 6-11) for diagnostic steps.

  4. 4

    If the issue persists after checking connections, the UI or main control board may need replacement.

Browse all codes in this manual (57)
Verified technical data. Last updated: April 2026

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Source: Whirlpool Cabrio Washing Machines
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