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Source-backed error-code guide

Reviewed

Bosch Dishwasher E12 / E2060 Error Code

Bosch identifies E12 and E2060 as limescale buildup in the heat pump and directs owners to descale the dishwasher with a Bosch-approved dishwasher descaler, with softening salt used as applicable on models with a water softener.

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

What the appliance detected

Detected condition

The dishwasher reports limescale buildup in the heat pump.

What may contribute

Possible causes

  • Mineral scale may have accumulated in the heat-pump water path.
  • Hard water can increase scale buildup over time.
  • A model with a water softener may need correct salt setup or replenishment.

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 E12 / E2060 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

    • Follow the exact dishwasher manual and the descaler label for cycle, amount, placement, and whether the dishwasher must be empty.
    • Use a dishwasher descaling product approved for the appliance; do not improvise with mixed household chemicals.
    • If the model has a built-in water softener, confirm salt use and water-hardness settings from the model manual.

  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

  • E12 or E2060 remains after one correctly completed manufacturer-supported descaling procedure.
  • The dishwasher leaks, cannot circulate or drain, or cannot complete the descaling cycle.
  • Any heat-pump, heater, sensor, or internal water-system diagnosis is 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.

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