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How-to guide Bosch

How to clean your Bosch dishwasher filter

A dirty filter reduces cleaning power and causes odours. Clean it monthly to keep your dishwasher running efficiently.

Difficulty: Easy
Time: 15 min

Step-by-step

  1. 1

    Empty the dishwasher completely

    Remove all dishes and utensils. Make sure the dishwasher is empty before you start.

  2. 2

    Locate the filter assembly

    Open the dishwasher door and look at the bottom. The filter is usually in the rear corner of the wash chamber.

    💡 Consult your user manual if you cannot find it easily.

  3. 3

    Remove the coarse filter

    Grasp the coarse filter basket and twist it anticlockwise. Pull it upwards to remove it from the filter housing.

    💡 The coarse filter traps large food particles and is easiest to clean first.

  4. 4

    Rinse under running water

    Hold the coarse filter under warm tap water. Use your fingers or a soft brush to remove trapped food debris.

    💡 Avoid harsh scrubbing as it can damage the filter mesh.

  5. 5

    Remove the fine filter

    Locate the fine filter beneath the coarse filter. Pull the handle upwards and twist anticlockwise to release it.

    💡 This filter is more delicate; handle it carefully.

  6. 6

    Clean the fine filter

    Rinse under warm water and use a soft brush on both sides. Remove any grease or stubborn particles gently.

    💡 For stubborn deposits, soak the fine filter in warm water for 10 minutes first.

  7. 7

    Check the filter housing

    Inspect the filter chamber for any remaining debris. Wipe it clean with a damp cloth.

    💡 Remove any food bits that may have settled in the bottom of the chamber.

  8. 8

    Reassemble the filters

    Insert the fine filter first and twist clockwise until secure. Place the coarse filter on top and twist clockwise until it clicks into place.

    💡 Both filters must be firmly locked or water may leak around them.

⚠️ Always disconnect your appliance from mains power before starting any repair. If in doubt, consult a qualified engineer.

Parts you may need

filter

Bosch dishwasher fine filter

OEM: 427903

Replacement fine filter for improved cleaning and water flow.

filter

Bosch dishwasher coarse filter basket

OEM: 427904

Replacement coarse filter basket to trap large food particles.

accessory

Bosch filter cleaning brush

OEM: 165263

Soft-bristled brush designed to clean dishwasher filters safely.

FAQs

How often should I clean the filter?
Clean the filter monthly for normal use. If you notice poor drainage or odours, clean it weekly.
Can I use a dishwasher cleaner on the filters?
No, use only warm water and a soft brush. Harsh chemicals can damage the filter material.
What if the filter won't come out?
Check you're twisting anticlockwise and pulling straight up. If it's stuck, soak the entire assembly in warm water for 15 minutes and try again.