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Bosch · Dishwasher · E09

Diagnostic overview

An internal heat-pump heater fault was detected.

Diagnostic nodeE09DIAGNOSIS
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Coverage: Bosch dishwasher families that use E09/E:09.

GUIDANCE

Diagnostic overview for error E09

Use the sequence meaning → symptoms → accessible checks → stop conditions. For E09, the current manufacturer-sourced summary is: Bosch defines E09 as an internal heater fault in the heat-pump system and recommends a 30-second power reset, then service if unresolved.

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