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5 Reasons A Bosch Dishwasher Is Not Draining Water

Bosch dishwasher not draining water completely at the end of a cycle? This draining issue can lead to the water staying in the bottom of the dishwasher, odors, and mold growth. We will show you 5 common reasons why a Bosch dishwasher is not draining and how to fix it.

Bosch Dishwasher Not Draining Water

5 Reasons for Bosch Dishwasher Not Draining

  1. Check for a blockage in bottom of dishwasher.
  2. Inspect the drain pump for problems.
  3. The filter might be clogged.
  4. Drain hose is bent or blocked?
  5. Check valve not working.

There are several reasons why your Bosch dishwasher may not drain completely at the end of a cycle.

1. Blockage in the Dishwasher

A blockage in the dishwasher’s drain system can prevent water from draining efficiently. Common blockage sources include food particles, broken glass, or foreign objects.

Examine the Dishwasher for Blockages

  1. Turn off and unplug the dishwasher before performing any maintenance.
  2. Remove the bottom rack and inspect the dishwasher’s interior for any visible blockages, such as food particles or foreign objects.
  3. If you find any blockages, remove them carefully and dispose of them properly.

2. Faulty Drain Pump

The drain pump is a critical component that helps remove water from the dishwasher. If the pump is malfunctioning or damaged, it may prevent the dishwasher from draining properly and also show an error code on the Bosch dishwasher display.

Check the Drain Pump

  1. Locate the drain pump at the bottom of the dishwasher, typically beneath the filter.
  2. Inspect the drain pump for any visible damage or blockages.
  3. If you notice any debris, remove it carefully and clean the drain pump.
  4. If the drain pump appears damaged or faulty, consider replacing it.

3. Clogged Filter

Over time, the dishwasher’s filter can become clogged with debris and food particles. A clogged filter can obstruct water flow, leading to drainage issues, and cause a dishwasher beeping issue.

Clean the Filter

  1. Locate the dishwasher’s filter, usually situated at the bottom of the appliance.
  2. Remove the filter by twisting it counterclockwise and lifting it out.
  3. Clean the filter thoroughly under running water, using a soft brush if necessary.
  4. Once the filter is clean, replace it by inserting it back into the dishwasher and twisting it clockwise.

Bosch dishwasher not draining out water

4. Kinked or Damaged Drain Hose

A kinked or damaged drain hose can impede water flow and prevent your Bosch dishwasher from draining completely.

Inspect the Drain Hose

  1. Locate the drain hose connected to the dishwasher and the sink’s drain pipe.
  2. Check the hose for any kinks or damage.
  3. If the hose is kinked, straighten it out to allow proper water flow.
  4. If the hose is damaged, consider replacing it.

5. Faulty Check Valve

A check valve allows water to flow in one direction and prevents it from flowing back into the dishwasher. A faulty check valve can cause water to flow back into the dishwasher, leading to drainage problems.

Test the Check Valve

  1. Locate the check valve, usually found at the end of the drain hose or within the dishwasher’s sump.
  2. Inspect the check valve for any visible damage or blockages.
  3. If the check valve is blocked, clean it carefully.
  4. If the check valve is faulty or damaged, consider replacing it.

Prevent Dishwasher Drain Issues

Keep your Bosch dishwasher running efficiently and prevent drainage problems.

  1. Regularly clean the dishwasher filter to prevent clogs.
  2. Before putting dishes in the dishwasher, remove any leftovers to reduce the amount of food particles present.
  3. Inspect the dishwasher’s interior for any visible blockages and remove them as needed.
  4. Check the drain hose and drain pump periodically for any signs of damage or blockages.
  5. Periodically run a dishwasher cleaner through your appliance to help maintain its performance.

How often should I clean my Bosch dishwasher filter?

It’s recommended to clean your Bosch dishwasher filter every one to two months. However, if you notice your dishwasher not draining properly or performing poorly, consider cleaning the filter more frequently.

How can I tell if my dishwasher’s check valve is faulty?

A faulty check valve may cause water to flow back into the dishwasher or not drain completely. If you notice these issues and have ruled out other potential causes, the check valve may be the culprit.

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