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Diagnostic LED OFF or ON

Diagnostic LED OFF or ON — Main Control malfunction

Whirlpool · Cabrio Washing Machines

What does Diagnostic LED OFF or ON mean?

The diagnostic LED on the main control board is either off or solid on. This indicates a malfunction with the control unit. Normally, this LED should be flashing to show the processor is functioning.

Common Causes

  • Main control board failure or internal issue.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Unplug the washer for 30 seconds and plug it back in to reset the control.

  2. 2

    Check all wire harness connections to the main control for looseness or corrosion.

  3. 3

    Refer to TEST #1: Main Control (page 6-5) to verify main control functionality.

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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