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Heavy foam

Heavy foam build-up - Too much detergent used

Bosch · Washing Machines

What does Heavy foam mean?

Excessive foam is building up in the drum or is detected by the appliance's foam detection system. This usually indicates that too much detergent has been used for the laundry load.

Common Causes

  • Detergent dosage is too high.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Immediately mix one tablespoon of fabric softener with 0.5 litres of water and pour the mixture into the left-hand detergent compartment (do not use for outdoor, sportswear, or down-filled items).

  2. 2

    For your next washing cycle with a similar load, reduce the amount of detergent used.

  3. 3

    Ensure you are using the correct detergent type and amount according to the manufacturer's recommendations for your water hardness.

Browse all codes in this manual (95)
Verified technical data. Last updated: April 2026

Related Faults

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Source: Bosch Washing Machines
Open Manual (Page 55)Search more codes in this manual