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Bosch · Dishwasher · E09

Diagnostic decision tree

An internal heat-pump heater fault was detected.

Diagnostic nodeE09DECISION-TREE
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Use this as a diagnostic branchConfirm the exact model manual before ordering parts or opening the appliance.

Coverage: Bosch dishwasher families that use E09/E:09.

GUIDANCE

Diagnostic decision tree for error E09

Confirm E09; verify Bosch and dishwasher; compare the observed symptom; complete accessible checks in order; stop and request service if the code persists or a stop condition appears.

Safe sequence

  1. 1Turn off the dishwasher.
  2. 2Reset power at the breaker for 30 seconds.
  3. 3If E09 returns, stop use and contact Bosch support.

Stop and get qualified help when

  • The code returns after reset
  • There is overheating, odor or breaker tripping
Primary sourceBosch — dishwasher error codes ↗Verified 2026-07-17 · manufacturer