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Bosch · Dishwasher · E09

Possible causes

An internal heat-pump heater fault was detected.

Diagnostic nodeE09CAUSES
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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

Possible causes for error E09

Published guidance and the observed behavior point to these possibilities: Heat-pump internal heater fault; Internal heating circuit issue; Component or connection failure. Check accessible conditions before considering a component fault.

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