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Excessive foam

Excessive formation of foam occurs — Unsuitable product or spillage

Bosch · Dishwashers

What does Excessive foam mean?

Too much foam is generated during the wash cycle, often due to incorrect products being introduced or spillage of rinse aid.

Common Causes

  • Hand soap got into the rinse aid dispenser.
  • Rinse aid has been spilled.
  • Detergent or machine care product used causes excessive foaming.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    If hand soap entered the rinse aid dispenser, clean it out thoroughly before adding correct rinse aid.

  2. 2

    If rinse aid has been spilled, immediately wipe it away with a cloth.

  3. 3

    If the detergent or machine care product is causing excessive foaming, change the brand of detergent or product used.

  4. 4

    Add rinse aid to the dispenser only when it's dry and ensure it's the correct product.

Browse all codes in this manual (33)
Verified technical data. Last updated: April 2026

Related Faults

All LEDs light or flashAll LEDs light up or flash — Electronics fault detectedAppliance cannot be switched onAppliance cannot be switched on or operated — Power, software, or function failureAppliance does not startAppliance does not start — Power, connection, or door issue
Source: Bosch Dishwashers
Open Manual (Page 31)Search more codes in this manual