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Bosch · Dishwasher · E02

Wash-cycle diagnosis

A main-control-board relay fault was detected.

Diagnostic nodeE02WASH-CYCLE
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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

Wash-cycle diagnosis for error E02

Wash-cycle diagnosis can help narrow the context of Bosch E02, but this page does not claim that the named system is the failed component. Begin with the manufacturer meaning — A main-control-board relay fault was detected. — then complete only accessible checks: Switch the dishwasher off.; Reset the circuit breaker for 30 seconds.; If the display returns, keep the unit off and contact Bosch 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