Bosch Dishwasher Error Codes [What Do They Mean?]

By: Talen Quire

Understanding Bosch dishwasher error codes can be a lifesaver when you’re faced with a dishwasher that suddenly refuses to cooperate. It’s frustrating to see those mysterious codes flash on the display, leaving you wondering what went wrong. The good news is, you’re not alone in this; many people experience similar issues with their appliances.

One common pain point with Bosch dishwashers is the unexpected interruption in water flow, which often leads to errors like E15 or E24. Did you know that Bosch dishwashers are equipped with advanced sensors that can detect even the slightest issue? This feature helps prevent damage but can also trigger error codes that leave users puzzled.

I’m here to demystify these codes and guide you through simple solutions. We’ll dive into what each code means and how to address the problem, saving you time and a call to the technician. Let’s get started!

Bosch dishwasher showing error code

What Are the Dishwasher Error Codes?

Dishwasher error codes are a series of alphanumeric signals that your Bosch appliance uses to indicate specific issues. These codes serve as a communication tool between the dishwasher and the user, helping identify problems ranging from minor glitches to more serious faults.

Understanding these error codes is vital for diagnosing problems and determining whether you can handle the fix or need a technician’s assistance. By familiarizing yourself with these codes, you can troubleshoot effectively, ensuring your Bosch dishwasher runs smoothly and efficiently.

Where Can We Find the Meaning of Error Codes?

To find the meanings of error codes on a Bosch dishwasher, there are several reliable resources you can consult.

The first place to look is the Bosch owner’s manual for your specific dishwasher model. This manual usually contains a section dedicated to error codes, providing detailed explanations of what each code signifies and offering step-by-step instructions to address them.

If it doesn’t resolve your issue, contacting Bosch customer support can be helpful. Their trained technicians can provide advice tailored to your specific situation and error code.

What Are the Error Codes on the Bosch Dishwasher?

Bosch dishwasher error messages

Bosch dishwashers display error codes to help diagnose and troubleshoot issues efficiently. Understanding these codes can save time and prevent unnecessary repairs. Here are some common Bosch dishwasher error codes, their meanings, and potential solutions:

  • E01 indicates a pump control circuit failure on the main control board, often resulting in insufficient water in the dishwasher and preventing the heater from operating. If you see this code, it’s essential to check the control board for faults or consider consulting a technician for detailed diagnostics.
  • E02 refers to a heater relay fault on the control board, possibly caused by a faulty temperature sensor or thermistor. This error may affect the dishwasher’s ability to heat water properly.
  • E03 suggests an auxiliary heater relay fault or a water inlet valve failure, which can prevent the dishwasher from filling with water. Checking the valve and relay connections might resolve this issue.
  • E04 indicates a heating issue, possibly due to a clogged spray arm or a faulty water flow sensor. Ensuring the spray arm is free of obstructions can help fix this problem.
  • E05 points to a water switch Triac fault or a float issue, potentially involving a damaged float or defective float switch. This might require inspecting the float mechanism and replacing it if necessary.
  • E06 relates to a door mechanism failure or aqua sensor fault, which may involve issues with the door closing properly or a faulty aqua sensor. Ensuring the door closes correctly and checking the sensor can address this error.
  • E07 indicates a drying fault, possibly due to problems with the drying fan or its wiring. Inspecting the fan and connections can help resolve this issue.
  • E08 suggests a loss of water during the cycle, which could be due to overturned dishes or a water supply issue. Checking the water supply and dish arrangement can help correct this problem.
  • E09 signifies a problem with the heating element, possibly due to water in the heater or limescale buildup. Descaling the dishwasher might be necessary to resolve this code.
  • E15 is triggered when the leak protection system activates, indicating water has entered the machine’s base. Addressing any leaks or spills and ensuring the base is dry can reset the error.
  • E16, E17, and E18 indicate problems with the water supply, such as a clogged or kinked water inlet hose. Inspecting and correcting the hose alignment can fix these issues.
  • E19 error flashing means that your dishwasher’s internal valve is faulty.
  • E20 and E21 codes are displayed when there’s a problem with the dishwasher’s heat pump. Check it for any damage and replace it if needed.
  • E22 signals a blocked filter, causing excess water to build up in the sump. Regularly cleaning the filter can prevent this error.
  • Error codes E23, E24, and E25 relate to drainage issues, such as a clogged filter or blocked drain pump. Ensuring the drain system is clear and functional can resolve these codes. Also, check the drain pump continuity with a multimeter and replace it if needed.
  • E26 code is related to the diverter motor. Check the motor for faults.
  • The E27 code is displayed when the voltage power is low. Ensure the dishwasher is receiving proper voltage,
  • The E28 error code is also related to the aqua sensor malfunction just like the E06 code.
  • E29 code means that the mains voltage is low. Stabilize the voltage to get rid of this error.
  • E30 indicates that the voltage is too high. Make sure the voltage should be less than 240 volts.

What Should I Do When Encountering Error Code on a Bosch Dishwasher?

When encountering an error code on a Bosch dishwasher, it’s important to follow a structured approach to diagnose and potentially resolve the issue. Here’s what you can do:

  1. Power Reset: Begin by turning off the dishwasher and unplugging it, or switch off the circuit breaker for about 30 seconds. This process can reset the control board, clearing some error codes and giving the appliance a fresh start.
  2. Check the Water Supply: Ensure that the water inlet hose is not kinked or blocked. Verify that the water supply is turned on and that there is adequate water pressure. A restricted water flow can cause errors related to water supply issues.
  3. Examine the Door and Latch: Ensure the dishwasher door is properly closed and latched. A faulty door latch can prevent the dishwasher from operating correctly, leading to operational error codes. If necessary, adjust or replace the latch to ensure proper closure.
  4. Consult the Manual or Online Resources: Refer to the dishwasher’s user manual or Bosch’s official website for specific guidance on the error code you’re encountering. These resources often provide detailed troubleshooting steps tailored to your specific model and issue.
  5. Contact Bosch Customer Support: If the error persists after performing these steps, call Bosch Customer Support at 1-800-944-2904 for further assistance. They can provide specific advice based on your dishwasher model and error code.

How Can You Override Error Codes on the Bosch Dishwashers?

overriding error codes on bosch dishwasher

Overriding error codes on a Bosch dishwasher isn’t usually recommended, as these codes signal underlying issues that should be addressed to maintain the appliance’s efficiency and longevity. However, you can attempt to reset the dishwasher to clear the error temporarily. Here are some steps you can take to try and override the error codes safely:

  1. Identify and Address the Problem: The first step is to determine the specific error code and its meaning by consulting the user manual or Bosch’s official resources. Once identified, take action to resolve the root cause of the error. This might involve clearing blockages, checking the water supply for any kinks or obstructions, or fixing leaks that might be affecting the dishwasher’s performance.
  2. Drain Accumulated Water: For errors related to water accumulation, like the E15 error, you might need to remove water from the base of the dishwasher. To do this, tilt the dishwasher slightly to allow water to drain out, or manually remove the water with a sponge or towel. Ensure the appliance is turned off and unplugged while performing this task to avoid any electrical hazards.
  3. Restart the Dishwasher: After addressing the issue, restore power to the dishwasher and initiate a new cycle to determine if the error persists. If the error code does not appear again, monitor the dishwasher for any recurrence of the problem.
  4. Consult Professional Help: If the error code returns or if troubleshooting steps do not resolve the issue, contact Bosch Customer Support or a professional technician for further assistance. Attempting to override an error code without proper resolution might lead to more significant problems, potentially causing damage to the dishwasher.

While these steps can help clear error codes temporarily, it’s crucial to address the underlying issues to prevent them from recurring. Ignoring or overriding error codes without fixing the cause can result in more severe complications with the dishwasher, reducing its lifespan and effectiveness. Always prioritize resolving the root of the problem for a long-term solution.

Is It Safe to Use Bosch Dishwasher When It’s Displaying an Error Code?

It’s generally not safe to use a Bosch dishwasher when it’s displaying an error code. These codes serve as warnings about specific issues that need immediate attention to ensure the dishwasher remains safe and functional. Ignoring these alerts can lead to serious consequences.

For instance, some error codes, such as E15, indicate a water leak. If left unaddressed, this can cause flooding or even electrical hazards. In another example, codes like E24 or E25 point to problems with water drainage, potentially leading to more significant internal damage or malfunction if the appliance continues to operate.

Addressing these errors promptly not only protects your dishwasher from further damage but also ensures your home’s safety. Continuing to use the appliance without resolving the issue could worsen the problem, resulting in costly repairs or the need for a complete replacement.

So, when your Bosch dishwasher displays an error code, it’s best to pause and resolve the issue before running another cycle. This approach ensures both the longevity of your appliance and the safety of your household.

What Maintenance Tips Can Help Avoid Bosch Dishwasher Error Codes?

Bosch dishwasher maintenance tips for error codes

To avoid Bosch dishwasher error codes, consistent maintenance is key. Here are some practical tips that can help keep your dishwasher in good working condition and prevent common issues:

  1. Regular Filter Cleaning: The dishwasher filter should be cleaned regularly to prevent clogs and ensure smooth water flow. Removing the filter and rinsing it under running water will help clear debris. Scrubbing it with a soft brush can eliminate stubborn particles that might restrict water flow, which could lead to error codes.
  2. Descaling: Descaling the dishwasher periodically helps remove limescale buildup, especially in areas with hard water. Running an empty hot cycle with a descaler keeps internal components clean and functioning properly, reducing the risk of errors like E17.
  3. Spray Arm Maintenance: Inspecting and cleaning the spray arms is crucial. Food particles or limescale can clog the spray holes, affecting the dishwasher’s performance. Removing the spray arms and cleaning them with hot soapy water can help maintain optimal water distribution.
  4. Using Quality Detergents: The use of high-quality dishwasher detergents and rinse aids helps prevent residue buildup, which can cause performance issues. Keeping the rinse aid dispenser filled enhances drying efficiency and reduces spotting on dishes.
  5. Door Seal Inspection: Regularly checking the door seals for wear or damage is essential to prevent leaks. Cleaning the seals with a damp cloth removes debris that could interfere with the seal’s effectiveness, safeguarding against errors like E15.
  6. Water Softener Maintenance: If your dishwasher has a water softener, ensuring it is filled with the appropriate salt can prevent limescale buildup. This step is particularly important in regions with hard water and can help avoid issues related to mineral deposits.
  7. Running Hot Cycles: Occasionally running the dishwasher on its hottest cycle without dishes inside helps clear any accumulated grease or residue. This practice keeps the interior clean and reduces the likelihood of clog-related errors.
  8. Inspecting Hoses and Connections: Regularly checking the water inlet and drain hoses for kinks, blockages, or loose connections can prevent water flow problems. Ensuring secure connections minimizes the risk of leaks and related error codes such as E24 and E25.

Conclusion

Understanding Bosch dishwasher error codes is essential for maintaining the appliance’s performance and longevity. By recognizing these codes, you can quickly identify and address issues before they escalate, saving time and preventing costly repairs.

Regular maintenance, such as cleaning filters, descaling, and inspecting hoses, plays a crucial role in avoiding common errors. Following these practices ensures smooth operation and helps prevent interruptions caused by error codes.

Additionally, promptly addressing any error codes that do appear is vital for the safety and effectiveness of your dishwasher. By taking these steps, you can keep your Bosch dishwasher running efficiently and extend its lifespan, ultimately enhancing your kitchen’s functionality.

About Talen Quire

Talen Quire is a seasoned mechanical engineer with 20 years of industry experience. He earned his engineering degree from the University of Michigan and holds certifications in research and prototype development. Talen has collaborated with top brands like KitchenAid, GE, and BOSCH. Currently, he works at a leading research and development company. Passionate about technology, Talen actively shares the latest tech updates online, engaging a community of enthusiasts and professionals. Outside of work, he's an amateur astronomer and enjoys woodworking, creating detailed furniture and gadgets in his workshop.

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