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Bosch · Dishwasher · E02

Diagnostic overview

A main-control-board relay fault was detected.

Diagnostic nodeE02DIAGNOSIS
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Use this as a diagnostic branchConfirm the exact model manual before ordering parts or opening the appliance.

Coverage: Bosch dishwashers using E02/E:02; model-specific diagnosis is required.

GUIDANCE

Diagnostic overview for error E02

Use the sequence meaning → symptoms → accessible checks → stop conditions. For E02, the current manufacturer-sourced summary is: Bosch identifies E02 as a main control board relay fault and limits user action to a 30-second power reset before contacting support.

Safe sequence

  1. 1Switch the dishwasher off.
  2. 2Reset the circuit breaker for 30 seconds.
  3. 3If the display returns, keep the unit off and contact Bosch support.

Stop and get qualified help when

  • E02 persists after one reset
  • The breaker trips or electrical odor is present
Primary sourceBosch — dishwasher error codes ↗Verified 2026-07-17 · manufacturer