Appliance Help HQ
Menu
ENEnglishESEspañolPT-BRPortuguês

Source-backed error-code guide

Reviewed

Bosch Dishwasher E04 / E0105 Error Code

Bosch identifies E04 and E0105 as faulty heater electronics detected by self-test. Bosch directs owners to contact Customer Support rather than perform internal heater or electrical diagnosis.

Applies to Bosch dishwasher whose exact model documentation uses the listed display

What the appliance detected

Detected condition

The dishwasher self-test detected faulty heater electronics.

What may contribute

Possible causes

  • The self-test detected an internal heater-electronics fault condition.
  • A heater, control, connection, or wiring problem may require qualified diagnosis.

Start conservatively

Safe preliminary checks

Work in order and stop whenever a step is not supported by the documentation for your model.

  1. Record the exact display and model

    • Photograph the display before clearing E04 / E0105 and confirm every character.
    • Confirm the full Bosch E-Nr / model number because codes and supported reset procedures can vary by series.

  2. Use only Bosch-documented exterior checks

    • Record the code and model number and contact Bosch support; Bosch does not provide a homeowner repair procedure for this condition.

  3. Stop at the service boundary

    • If the code remains or returns after the documented check, contact Bosch Customer Support or qualified appliance service.
    • Do not pull the dishwasher apart to reach pumps, heaters, control boards, sensors, wiring, or other internal components.

Actions not recommended

  • Do not test live voltage, remove electrical covers, or access the control board.
  • Do not bypass door, leak, heater, or other safety controls.
  • Do not replace a pump, heater, sensor, dispenser, wiring harness, or control board from the code alone.

When to stop and request service

  • E04 or E0105 is displayed.
  • Heating performance is abnormal or a cycle cannot complete.
  • Any heater, control, connector, or wiring access would be required.

Documented source

Official information reviewed

Our summary is based on manufacturer support material and stays within the limits of that material.

Source reviewed by Appliance Help HQ: September 22, 2026.

Appliance Help HQ is an independent informational site and is not affiliated with or endorsed by Bosch.

Think this information has changed? Report a correction.