Troubleshooting Bosch dishwashers refers to the process of identifying and resolving issues that may arise with these specific dishwasher models. When a Bosch dishwasher encounters problems such as not cleaning dishes effectively, unusual noises, error codes, or other malfunctions, troubleshooting steps are taken to diagnose the root cause and find solutions to rectify the problems.

Troubleshooting may involve inspecting various components such as spray arms, filters, pumps, and sensors, as well as examining the dishwasher’s electronic controls and settings. troubleshooting Bosch dishwashers is a crucial process that allows users to diagnose and fix common dishwasher issues, ensuring optimal performance and extending the lifespan of the appliance.

Bosch Dishwasher Troubleshooting: Causes and Fixes

Dishwasher Troubleshooting: Common Dishwasher Problems
Bosch Dishwasher Problems

1. Bosch Dishwasher Fills Up With Clean Water By Itself

Dishwasher Filling With Water When Off
How to Fix a Dishwasher That Fills with Too Much Water

Cause: This issue could be caused by a faulty water inlet valve that is not closing properly, leading to continuous water flow into the dishwasher even when it’s not running.

Fix: To resolve this, you may need to replace the water inlet valve. It’s recommended to consult a professional technician for proper diagnosis and replacement.

2. Bosch Dishwasher Buttons Not Working

Bosch dishwasher buttons not responding
Fixing Bosch Dishwasher Buttons Not Responding

Cause: Non-responsive buttons may result from a control panel malfunction, electronic control board issue, or water damage to the control panel.

Fix: Start by checking for any visible signs of water damage. If found, allow the control panel to dry thoroughly. If the buttons still don’t work, the control panel or electronic control board may need replacement or repair by a qualified technician.

3. Bosch Dishwasher Fills Up With Dirty Water

Cause: A clogged drain hose or faulty drain pump can lead to dirty water being unable to drain properly, causing it to accumulate in the dishwasher.

Fix: Inspect and clean the drain hose for any clogs or obstructions. If the issue persists, check the drain pump for any debris or malfunction, and replace it if necessary.

4. Bosch Dishwasher Lights Flashing or Blinking

Bosch Dishwasher Light Flashing
Bosch Dishwasher lights flashing or blinking

Cause: Blinking lights could indicate an error code, signaling a specific issue with the dishwasher’s components.

Fix: Refer to the dishwasher’s user manual to identify the specific error code and its corresponding troubleshooting steps. Address the underlying cause based on the error code instructions.

5. Bosch Dishwasher Not Draining Properly

Cause: Poor draining can result from a clogged filter, drain pump issues, or a blocked drain hose.

Fix: Start by cleaning the filter and ensuring there are no obstructions. Next, check the drain pump for debris or damage and clear or replace it as needed. Verify the drain hose for clogs or kinks and rectify any issues.

6. Dishwasher Won’t Start

Cause: If the dishwasher fails to start, there might be an issue with the door latch or door switch not engaging properly.

Fix: Inspect the door latch and switch for any misalignment or damage. Adjust or replace them as necessary to ensure the door closes securely and triggers the start cycle.

7. Water Not Filling Up Bosch Dishwasher

Cause: A faulty water inlet valve or a blocked water supply line can prevent water from entering the dishwasher.

Fix: Check the water supply line for any obstructions or kinks. If the line is clear, test the water inlet valve for functionality. Replace the valve if it’s defective to allow water to fill the dishwasher properly.

8. Dishwasher Making Noise

Cause: Unusual noises during operation can be caused by loose spray arms, debris in the pump, or malfunctioning parts.

Fix: Inspect the spray arms and tighten any loose components. Clean the pump of any debris or foreign objects. If the noise persists, identify the specific source of the noise and repair or replace the affected part.

9. Bosch Dishwasher Not Drying Dishes

Cause: Inadequate drying could be due to a malfunctioning heating element or a faulty drying fan.

Fix: Check the heating element for any signs of damage or defects. Test the drying fan for proper operation. Replace any faulty components to restore effective dish drying.

10. Dishwasher Leaking From Motor Area

Cause: A leaking dishwasher from the motor area may result from a damaged pump seal or a cracked pump housing.

Fix: Inspect the pump seal and housing for any signs of wear or damage. Replace the faulty parts to prevent further leakage and restore proper dishwasher function.

Bosch Error Codes

How to Solve Bosch Dishwasher Error Code
Common Bosch Dishwasher Error Codes

Bosch dishwashers may display error codes to indicate specific issues or malfunctions. These error codes help users and technicians identify the problem and take appropriate actions for troubleshooting. Here are some common Bosch dishwasher error codes and their meanings:

  1. E01 or E1: This error code indicates a water supply issue. It could be due to a clogged or kinked water inlet hose, a faulty water inlet valve, or low water pressure.
  2. E02 or E2: This error code points to a problem with the dishwasher’s heating element. It may be caused by a faulty heating element or a problem with the temperature sensor.
  3. E03 or E3: The dishwasher’s system detects a water leak. This error code could be due to a damaged hose, a faulty door seal, or a leaking pump.
  4. E04 or E4: The dishwasher’s water sensor detects overfilling. It may be caused by a faulty water inlet valve or a problem with the dishwasher’s electronic control board.
  5. E05 or E5: This error code indicates a malfunction with the dishwasher’s drain pump. It could be due to a clog in the drain hose or a faulty drain pump.
  6. E06 or E6: The dishwasher’s door is not closing properly. This error code may occur due to a misaligned door latch or a damaged door lock mechanism.
  7. E09 or E9: This error code indicates an issue with the dishwasher’s water heating system. It could be caused by a faulty heating element, a problem with the water circulation, or a malfunctioning temperature sensor.
  8. E15 or E25: These error codes indicate water has leaked into the dishwasher’s base, triggering the anti-flood float switch. The leak must be located and fixed before resetting the dishwasher.
  9. E24: This error code indicates a drainage problem. It could be due to a clogged drain pump, a blocked drain hose, or a faulty drain pump.
  10. E25: The dishwasher’s filter or sump is clogged. Cleaning the filter and sump should resolve this error.

Test 1 – Water Woes and Beeps

  1. Fill ‘er up: Ensure there’s enough water in the dishwasher before starting a cycle.
  2. Lights on, pump running: Observe the dishwasher as it starts; check for any unusual behavior.
  3. The disappearing act: If the water vanishes before the cycle ends, it’s time to investigate further.

Test 2 – Monkeying with the Magnet

  1. The curious magnet: Delve into the world of dishwasher magnets and their role.
  2. The start button experiment: Pressing the start button with the magnet, what happens?
  3. Not-so-magical outcomes: Repeated attempts and observations with the magnet.

The Mystery of Blinking Lights

  1. Decoding the blinking: Understanding the significance of the blinking lights.
  2. The reset riddle: Attempting resets and deciphering the results.
  3. Curbing the quirks: Unraveling the intermittent failure and its potential causes.

Expert Insights – The Turbidity Sensor

  1. The turbidity sensor tale: Unveiling the role of the turbidity sensor in the dishwasher’s functioning.
  2. Potential culprit: Investigating how the sensor affects water levels and pump operation.
  3. Replacement and resolution: Addressing the need for sensor replacement to restore normal functioning.

Fixing Non-Cleaning Woes

  1. Spray arm scrutiny: Checking and unclogging the spray arm jets for optimal cleaning.
  2. Filter focus: Understanding the importance of a clean filter for efficient drainage.
  3. Soap selection: Opting for the right soap to ensure your dishwasher delivers spotless results.

How to Clean Dishwasher Pump

  • Turn off the dishwasher: Unplug it from the power source for safety.
  • Access the pump area: Remove the dishwasher’s bottom panel or spray arm to reach the pump.
  • Remove debris: Carefully clean out any food particles, labels, or foreign objects from the pump area.
  • Check the impeller: Ensure it spins freely and is not obstructed.
  • Reassemble the dishwasher: Put everything back in place and secure the bottom panel.

Frequently Asked Question

Q: Why is my dishwasher not cleaning well?

A: Several factors could contribute to poor cleaning, such as clogged spray arm jets, a dirty filter, or the use of unsuitable soap.

Q: How can I clean the spray arms effectively?

A: Remove the spray arms, unclog any debris from the jets, and ensure they rotate freely before reinstalling.

Q: What’s the best soap for my Bosch dishwasher?

A: We recommend using high-quality soap like Cole Colgate Cascade Complete tablets for optimal cleaning performance.

Q: Should I replace the turbidity sensor myself?

A: Unless you have experience and expertise, it’s best to have a professional technician replace the turbidity sensor.


With our troubleshooting guide, you’re well-equipped to tackle common issues with your Bosch dishwasher. From water woes to filter dilemmas, you now have the know-how to keep your dishwasher running smoothly and your dishes shining bright. Happy dishwashing!

Key Notes and Important Points:

  • Ensure there’s enough water in the dishwasher before starting a cycle.
  • Investigate disappearing water during the cycle.
  • Experiment with dishwasher magnets for potential fixes.
  • Observe and decode blinking lights for error insights.
  • Consider replacing the turbidity sensor for persistent issues.
  • Clean spray arm jets and the filter for better cleaning results.
  • Opt for high-quality soap like Cole Colgate Cascade Complete tablets.
  • Seek professional help for complex repairs and replacements.

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