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Coloured coatings inside

Coloured coatings (blue, yellow, brown) inside appliance/tableware - Substances in food/water or metal components

Bosch · Dishwashers Series 6

What does Coloured coatings inside mean?

Persistent coloured films appear inside the appliance or on stainless steel tableware. These are caused by substances in vegetables, tap water, or metal components.

Common Causes

  • The formation of films is due to substances contained in vegetables (cabbage, celery, potatoes, noodles, etc.) or tap water (manganese).
  • The formation of films is due to metal components on silver or aluminium tableware.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Clean the appliance using mechanical cleaning methods (Page 42) or a machine cleaning product.

  2. 2

    Be aware that complete removal may not always be possible, but these deposits are generally harmless to health.

  3. 3

    Avoid washing silver and aluminium items together if they cause discolouration.

Browse all codes in this manual (38)
Verified technical data. Last updated: April 2026

Related Faults

All LEDs lit up or flashingAll LEDs lit up or flashing - Electronics fault detectedAppliance cannot be switched on/operatedAppliance cannot be switched on or operated - Software update, power failure, or door issueAppliance stops/cuts out during programmeAppliance stops during the programme or cuts out - Door open, power/water interruption, or obstruction
Source: Bosch Dishwashers Series 6
Open Manual (Page 52)Search more codes in this manual