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Bosch · Dishwasher

Bosch Dishwasher error E09

An internal heat-pump heater fault was detected.

Error codeE09Also: E:09
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Stop and make safeBosch defines E09 as an internal heater fault in the heat-pump system and recommends a 30-second power reset, then service if unresolved.

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

What this code usually means

Bosch defines E09 as an internal heater fault in the heat-pump system and recommends a 30-second power reset, then service if unresolved.

BrandBosch
ApplianceDishwasher
ConfidenceManufacturer sourced

Safe checks, in order

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

Common symptoms

  • Water or dishes may remain cold
  • Cycle may stop
  • E09 appears near heating stages

Possible causes

  • Heat-pump internal heater fault
  • Internal heating circuit issue
  • Component or connection failure

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