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Bosch · Tumble dryer

Bosch Tumble dryer E03: Condensation drain hose obstructed

On supported Bosch tumble dryer models, E03 may indicate condensation drain hose obstructed. Verify your exact model before diagnosis.

ERROR CODEE03Verify the model and regional series

Model compatibility has not been independently verified

Earlier archive data contained suggested model or series names. Without a clear model/code table in a manufacturer manual, these names are no longer displayed as verified matches.

This is general brand/device guidance; check the model label and official manual.

Open manufacturer source

What does E03 mean?

On supported Bosch tumble dryer models, E03 may indicate condensation drain hose obstructed. Verify your exact model before diagnosis.

Source and model applicability: Bosch ABD kurutma makinesi aileleri; Türkiye modeli için E-Nr ile doğrulayın.

Manufacturer document consulted

Üretici hata kodu listesi ile genel anlam eşleştirildi; tek tek model/seri uyumu ayrıca doğrulanmadı. The manufacturer lists common families; no single specific model was validated for this entry.

View official manufacturer source

Safe checks to try

  1. 01

    Record the exact error and model

    Manual-guided maintenance

    Record Bosch E03, the full model label and the cycle/mode. Manufacturer meaning: Condensation drain hose obstructed. Check that the published source applies to your series.

    What to look for: The exact model prevents using instructions for a different appliance family.

  2. 02

    Inspect the external drain path

    Manual-guided maintenance

    Check visible kinks and the sink drain without opening the machine.

    What to look for: A blocked outlet can delay draining.

  3. 03

    Clean only the user-serviceable filter

    Manual-guided maintenance

    Wait for hot water to cool; follow your exact manual for filter cleaning and collect possible spills.

    What to look for: If water remains, arrange a professional pump check.

For a qualified service technician

An authorized technician should assess the component associated with 'Condensation drain hose obstructed' and verify the relevant signals and protections against the exact model service manual. Internal electrical and refrigerant work is not suitable for home repair.

Do not open electrical panels, sealed refrigerant lines, gas connections, heating elements or powered mechanisms at home.

After the issue is addressed

Confirm that E03 no longer appears during the normal user cycle. Retest according to the exact model manual; if it reappears, stop and contact authorized support.

Manufacturer references

Region and model family vary. These source links are not proof of compatibility with every Bosch appliance.