To keep your Bosch dishwasher working well, clean the drain. This helps avoid clogs and bad smells. Food debris, grease, and mineral buildup can block water flow over time. This can cause drainage problems.
This guide shows you how to clean the drain filter, drain hose, drain pump, and drain cover on several Bosch dishwasher models. These include the Bosch 800 Series, Bosch Series 2, Bosch Silence Plus, and Bosch Classixx.
Why Clean the Bosch Dishwasher Drain?

Several factors can cause drainage issues in your Bosch dishwasher:
- Obstructed Air Gap: Debris in the air gap can cause drainage problems.
- Clogged Filter: Food debris can block the filter, hindering water flow.
- Blocked Drain Hose: Kinks or obstacles in the drain hose stop proper drainage.
- Faulty Drain Pump: A malfunctioning pump can impede water from exiting the dishwasher.
How Often Should I Clean the Dishwasher Drain?
To maintain optimal performance, it is advisable to:
- Clean the filter: Every 3-6 months, depending on usage.
- Inspect the drain hose and pump: Annually or if you notice drainage issues.
How to Clean Bosch Dishwasher Drain – Step-by-Step

Tools and Materials Needed
- Soft cloth or sponge
- Soft-bristle brush or old toothbrush
- White vinegar
- Baking soda
- Dish soap
- Bucket or shallow pan
- Towels for drying
How to Clean the Bosch Dishwasher Drain Filter?

The drain filter prevents food particles from clogging the drain pump. If not cleaned, it can cause drainage issues.
Follow these simple steps:
- Disconnect Power: Unplug the dishwasher or switch off the circuit breaker for safety.
- Remove the Bottom Rack: Slide out the lower rack to access the dishwasher’s base.
- Find the Filter Assembly: It’s usually at the bottom centre. It has a cylindrical tube and a mesh filter.
- Remove the Filter: Twist the cylindrical filter counterclockwise and lift it out. Then, extract the mesh filter beneath.
- Clean the filter: Rinse it under warm water. Then, scrub it with a soft brush to get rid of food particles and grease.
- Reinstall the filter: First, put the mesh filter back in. Then, add the cylindrical filter and make sure it’s locked in place.
Tip: Cleaning the drain filter monthly improves water drainage and prevents bad smells.
How to Clean the Bosch Dishwasher Drain Pump?

The drain pump expels wastewater from the dishwasher. If it is clogged, the dishwasher may not drain properly.
Follow these simple steps:
- Turn off power – Ensure the dishwasher is unplugged.
- Remove standing water – Use a sponge or towel to soak up excess water.
- Access the drain pump – Found under the filter assembly, covered by a small plastic cover.
- Remove the pump cover – Unscrew or unclip it depending on your model.
- Check for obstructions – Remove any food particles, small objects, or debris.
- Reassemble and test – Put everything back and run a short wash cycle.
Tip: Regularly check the drain pump for blockages to ensure smooth drainage.
How to Clean the Bosch Dishwasher Drain Cover?

The drain cover keeps the drain opening safe. It stops large debris from getting into the drainage system.
Follow these simple steps:
- Remove the drain cover: Depending on the Bosch model, either lift or unscrew it.
- Clean the cover: Rinse under warm water. Scrub with a soft brush to remove buildup.
- Reinstall the cover: Place the clean drain cover back securely.
Tip: A clean drain cover ensures proper drainage and prevents debris build-up.
How to Clean the Bosch Dishwasher Drain Hose?

The drain hose carries wastewater from the dishwasher to the sink drain. It can get clogged with grease, food debris, or mineral deposits.
Follow these simple steps:
- Disconnect Power and Water Supply: Ensure both are turned off before proceeding.
- Find the Drain Hose: It’s usually at the back of the dishwasher, linked to the sink drain or garbage disposal.
- Detach the Hose: Place a bucket underneath to catch any water, then loosen the clamps and remove the hose.
- Inspect for Blockages: Look through the hose for obstructions. Use a long, flexible brush to clear any debris.
- Reattach the Hose: Secure it back in place, ensuring there are no kinks.
- Restore Power and Water: Turn them back on and run a short cycle to test drainage.
Tip: Inspect the drain hose every few months for blockages or leaks.
What is the best way to clear a dishwasher drain?

A natural cleaning solution of vinegar and baking soda works well to remove grease, grime, and bad smells from your dishwasher drain. It’s also eco-friendly.
Follow these simple steps:
- Clear away debris: Remove any visible food bits from the dishwasher filter and drain.
- Pour baking soda: Sprinkle 1 cup of baking soda directly into the dishwasher drain.
- Add vinegar: Pour 1 cup of white vinegar over the baking soda. Let it fizz for 15 minutes to break down grease and buildup.
- Flush with hot water: Use a hot water rinse cycle or pour boiling water down the drain to remove any leftover residue.
- Run a short cycle: Select a quick wash setting to ensure the drain is completely clean.
This method is safe for your Bosch dishwasher. It’s chemical-free and helps with drainage and odour control.
How to clean Bosch dishwasher (Step-by-Step Guide)
What Are the Best Preventative Measures?
- Pre-rinse dishes: Remove large food particles before loading.
- Avoid overloading: Ensure proper water circulation for effective cleaning.
- Use dishwasher cleaner: Run a monthly cycle with a specialized cleaner.
- Check drain hose periodically: Prevent blockages and buildup.
When Should You Call a Technician?
If your Bosch dishwasher won’t drain after you’ve cleaned the filter, drain pump, and hose, you might want to call a professional technician. Issues like a damaged drain pump or electrical malfunctions may require expert repairs.
FAQs
How Do I Know If My Bosch Dishwasher Drain is Clogged?
Signs of a clogged dishwasher drain include:
- Standing water at the bottom of the dishwasher.
- Slow drainage or error codes on the display.
- Bad odors coming from the drain.
Can I Use Commercial Drain Cleaners in My Bosch Dishwasher?
No, chemical drain cleaners can damage dishwasher parts. Instead, use vinegar, baking soda, or dishwasher-specific cleaning tablets.
How Do I Reset the Bosch Dishwasher Clean Drain Button?
To reset, press and hold the Start/Reset button for 3 to 5 seconds. If the problem persists, check for blockages in the drain system.
How to Reset Bosch Dishwasher (Step-by-Step Guide)
Final Thoughts
Regularly cleaning your Bosch dishwasher drain helps it drain well, stops bad smells, and makes your appliance last longer. Follow these simple cleaning steps and preventative tips to keep your dishwasher running like new.
Bonus Tip: Add drain maintenance to your monthly cleaning routine. This helps your Bosch dishwasher to last longer!