HomeError CodesWhat Is Bosch Dishwasher Error Code E09

What Is Bosch Dishwasher Error Code E09

Are you having trouble with your Bosch dishwasher and seeing the E09 error code? Don’t worry, this is a common issue that many people face. The E09 error code indicates a problem with the heating element of your dishwasher, which can cause it to stop working properly. However, there are several ways to troubleshoot and fix this problem on your own without needing to call in a professional.

In this article, we will explain what the E09 error code means and how you can diagnose and fix the issue. We’ll walk you through inspecting the heating element and wiring harness, testing the control board, resetting the dishwasher, using proper detergent, maintaining proper water temperature, seeking professional help if necessary, and preventing future errors. With our step-by-step guide, you’ll be able to get your Bosch dishwasher up and running again in no time!

Understanding the E09 Error Code

You’re now learning about what’s causing your dishwasher to stop working properly with a mysterious series of numbers. The E09 error code on a Bosch dishwasher indicates that there is an issue with the heating element. This could be caused by a malfunction in the heater relay or temperature sensor, or it could be due to a clogged filter.

When the heating element malfunctions, it can prevent the dishwasher from properly cleaning and drying your dishes. This is because the water may not be reaching the correct temperature to clean and sanitize your dishes, and they may not dry completely at the end of the cycle. It’s important to address this error code as soon as possible to avoid further damage to your dishwasher.

To troubleshoot this issue, you can try resetting your dishwasher by turning off the power for 5 minutes and then turning it back on again. If that doesn’t work, you may need to call a professional repair service to diagnose and fix the problem with your heating element. Don’t ignore this error code – addressing it promptly will help ensure that your dishwasher works efficiently for years to come!

Checking for Faulty Heating Element

Now it’s time to see if your heating element is the culprit behind the issue. The heating element plays a vital role in your dishwasher’s performance, as it heats up the water and dries your dishes. If it’s not working correctly, you may experience an E09 error code on your Bosch dishwasher. To check for a faulty heating element, you’ll need to access the back of your dishwasher.

Firstly, ensure that you’ve disconnected the power supply from your dishwasher before attempting any repairs or inspections. Once you’ve done this, remove the lower back panel of your Bosch dishwasher. You should be able to see the heating element at this point. Check for any visible signs of damage or wear and tear on its surface or connections. If there are any issues with either of these areas, you’ll need to replace the faulty part.

If you’re unsure about how to proceed with replacing parts on your Bosch dishwasher or aren’t confident in doing so yourself, consider calling a professional repair service instead. They can help diagnose and fix any issues with ease while ensuring that you don’t accidentally cause more harm than good in trying to fix things yourself. It’s always better to be safe than sorry when dealing with complex appliances like dishwashers!

Inspecting the Wiring Harness

Take a closer look at the wiring harness to see if it’s causing any issues – you’ll want to make sure everything is in good condition and securely connected. Here are a few steps to follow:

  1. Begin by turning off the power supply to your dishwasher.
  2. Open up the dishwasher door and locate the wiring harness. This is typically found near the bottom of the appliance, behind a panel or cover.
  3. Carefully inspect all wires for any signs of damage, such as frayed or burnt-out sections.
  4. Check that all connections are secure and free from corrosion.

If you notice any damaged wires or loose connections, this could be the cause of your E09 error code. In this case, you may need to replace parts of the wiring harness or repair any damaged areas.

It’s important to take care when inspecting the wiring harness as it can be delicate and easily damaged. If you’re unsure about what you’re doing, it’s always best to call in a professional technician who has experience working with dishwashers and their electrical components. By following these steps carefully, however, you should be able to identify any potential issues with your Bosch dishwasher’s wiring harness and get your appliance back up and running smoothly once again without an E09 error code appearing on its display screen!

Testing the Control Board

Let’s delve into how to test the control board and figure out what might be causing your dishwasher’s malfunction. The control board, also known as the main electronic control unit (ECU), is responsible for managing all of the dishwasher’s functions. This includes controlling water flow, monitoring temperature, and regulating cycles. If there is an issue with the control board, it can lead to error code E09 flashing on your Bosch dishwasher.

To begin testing the control board, you will need a multimeter. Turn off the power supply to your dishwasher before proceeding further. Locate the wires that connect to the control board and detach them carefully. Set up your multimeter for resistance testing and touch its probes to each of the pins on your detached wire harnesses. A working control board should show resistance between 1-3 ohms.

If your multimeter shows no reading or a significantly higher value than 1-3 ohms at any pin, then this indicates that there is a problem with the particular circuit responsible for that pin’s function in your Bosch dishwasher’s ECU. In such cases, you may need to replace either just that component or swap out an entire new ECU depending on what part has failed or if it cannot be repaired by a technician.

Resetting the Dishwasher

If your dishwasher seems unresponsive or stuck, a simple solution may be to reset it using a few easy steps. Follow these instructions to reset your Bosch dishwasher and see if it resolves the E09 error code:

  • Turn off the power supply to the dishwasher by unplugging it or turning off the circuit breaker that powers it.
  • Wait for about 10 minutes before turning the power back on.
  • After restoring power, press and hold down both the Power Scrub Plus and Regular Wash buttons.

Hold these buttons until you see all of the lights come on, which will take approximately 10 seconds. Once you’ve completed this process, try running a test cycle to see if the error code has disappeared. If resetting your Bosch dishwasher hasn’t resolved issue, then there may be something else going on with your machine.

It’s important to remember that while resetting your dishwasher is an easy fix for some issues, other problems may require professional repair services. Before attempting any repairs yourself, always consult with an expert or refer to your user manual. By following these steps for resetting your Bosch dishwasher, you’ll have taken a simple first step in diagnosing and resolving any issues it might be experiencing.

Cleaning the Filters and Spray Arms

Cleaning the filters and spray arms is an essential step in maintaining your dishwasher’s performance and ensuring that your dishes are properly cleaned. Over time, debris such as food particles, grease, and soap scum can accumulate in these areas, causing your dishwasher to operate less efficiently. This can result in poor cleaning results and even lead to more serious issues such as clogs or damage.

To clean the filters, remove them from the bottom of the dishwasher and rinse them thoroughly with hot water. Use a soft-bristled brush or toothbrush to gently scrub away any stubborn debris. Be sure to also check for any cracks or damage that may require replacement. To clean the spray arms, remove them from the dishwasher and use a toothpick or paper clip to clear any clogs from the spray holes. Rinse them with hot water before reattaching them to the dishwasher.

Regularly cleaning your dishwasher’s filters and spray arms not only helps maintain its performance but also extends its lifespan. This simple maintenance task can save you both time and money in repairs down the line. So make sure to add it to your routine cleaning checklist!

Using Proper Detergent

Make sure you’re using the right detergent for optimal cleaning performance in your machine. Using improper or low-quality detergent can lead to poor cleaning results, and can even cause issues with your dishwasher. It’s important to use a high-quality, specifically-formulated detergent that is meant for use in dishwashers.

When choosing a detergent, look for one that is designed to remove tough stains and residue, while also being gentle on your dishes and dishwasher components. Some detergents are formulated for hard water conditions, while others are made for soft water areas. Be sure to choose the right type of detergent based on your local water quality.

Using the proper detergent will not only help keep your dishes clean, but it will also prevent clogs in your dishwasher system which can cause error codes like E09. So take care when selecting what goes into your dishwasher – using the right detergent can make all the difference!

Maintaining Proper Water Temperature

To ensure your dishes are properly cleaned and to prevent potential issues, you’ll want to maintain the correct water temperature while running your machine. Your Bosch dishwasher requires hot water in order to effectively clean your dishes. If the water is not hot enough, it could result in poor cleaning performance or even lead to error codes like E09.

Here are some tips for maintaining proper water temperature when using your Bosch dishwasher:

  • Make sure that the hot water supply going into your dishwasher is at least 120°F (49°C). This will help ensure that the dishwasher can reach its optimal cleaning temperature.
  • Check that there are no kinks or blockages in the inlet hose leading into your machine. These could restrict the flow of hot water and impact cleaning performance.

By following these simple steps, you can help ensure that your Bosch dishwasher maintains proper water temperature during each cycle. Not only will this improve overall cleaning results, but it can also help prevent errors like E09 from occurring. Remember, proper maintenance and care of your appliance can extend its lifespan and save you money on repairs down the line.

Seeking Professional Help

If you’re experiencing technical difficulties with your Bosch dishwasher and the error code E09 keeps popping up, it’s time to seek professional help. While some may be tempted to fix the issue themselves, it’s important to remember that dishwashers are complex machines that require proper training and expertise to repair. Attempting to fix the problem on your own could lead to more damage or even personal injury.

By contacting a professional technician, you can ensure that your appliance operates smoothly and efficiently for years to come. These experts have a deep understanding of how dishwashers work and can diagnose any underlying issues quickly and accurately. They also have access to specialized tools and parts needed for repairs, which reduces the risk of further damage.

Don’t let an error code E09 prevent you from enjoying clean dishes every day. Contact a trusted appliance repair company today for prompt assistance with your Bosch dishwasher. With their help, you can get back to living your life without worrying about dirty dishes piling up in the sink!

Preventing Future Errors

Now that you’ve sought professional help for your Bosch dishwasher error code E09, it’s important to take steps to prevent future errors. One of the best ways to do this is by regularly cleaning and maintaining your dishwasher. Make sure to remove any food debris or build-up from the interior and exterior of the machine, as this can lead to clogs and other issues.

In addition, be mindful of what you’re putting in your dishwasher. Avoid overloading the machine or placing items in it that are too large or heavy. This can put strain on the parts and cause them to malfunction. Also, make sure you’re using the correct detergent and following all instructions for loading dishes.

Finally, consider scheduling regular maintenance check-ups with a professional technician. They can inspect your machine for any potential issues and make necessary repairs before they become major problems. By taking these precautions, you can help ensure that your Bosch dishwasher runs smoothly for years to come without experiencing error code E09 or any other complications.

Frequently Asked Questions

Can a Bosch dishwasher error code E09 be caused by anything other than a faulty heating element or wiring harness?

You may be wondering if there are any other reasons why your Bosch dishwasher is displaying error code E09 besides a faulty heating element or wiring harness. While those two issues are the most common causes of this error, it is possible that other factors could be contributing to the problem. For example, a clogged drain hose or filter could prevent water from circulating properly and cause the dishwasher to overheat. Additionally, a malfunctioning control module might also trigger an E09 error message. However, before exploring these possibilities, it’s best to first rule out the heating element and wiring harness as potential culprits by performing a thorough inspection and testing them with a multimeter tool.

How does using improper detergent affect the likelihood of an E09 error code appearing?

Using improper detergent can greatly increase the likelihood of an E09 error code appearing on your Bosch dishwasher. This is because certain detergents can create excessive suds and cause the dishwasher to overflow, which then triggers the E09 error code. To avoid this issue, it’s important to always use a high-quality detergent that is specifically designed for use in dishwashers. Additionally, make sure to carefully measure out the appropriate amount of detergent based on your load size and water hardness level. By taking these steps, you can help prevent issues with your Bosch dishwasher and keep it running smoothly for years to come.

Is it safe to attempt to repair a Bosch dishwasher if you don’t have experience with electrical work?

If you don’t have experience with electrical work, it is not safe to attempt to repair a Bosch dishwasher. These appliances contain high voltage components that can cause serious injury or even death if mishandled. It’s best to leave repairs to trained professionals who have the knowledge and tools necessary to safely diagnose and fix any issues. Trying to fix a problem yourself could potentially make things worse and end up costing you more in the long run. Safety should always be your top priority when dealing with any type of electrical equipment, so don’t take unnecessary risks with your Bosch dishwasher.

Can a Bosch dishwasher error code E09 be prevented through regular maintenance, or is it a random occurrence?

To prevent Bosch dishwasher error code e09, it is essential to regularly clean and maintain your dishwasher. Make sure to clear any debris or food particles from the filters and spray arms, as these can cause clogs that lead to error codes. Additionally, check the water inlet valve for signs of wear or damage and replace it if necessary. It’s also crucial to use the appropriate detergents and rinse aids recommended by Bosch to avoid any chemical buildup that could contribute to error codes. By taking these preventative measures, you can keep your Bosch dishwasher running smoothly and avoid unexpected breakdowns.

Will resetting the dishwasher always fix the E09 error code, or are more extensive repairs sometimes necessary?

If you encounter a Bosch dishwasher error code e09, resetting the appliance may solve the problem. However, there are instances where more extensive repairs might be necessary to fix this issue. To reset the dishwasher, you need to turn it off and unplug it for a few minutes before plugging it back in and turning it on again. If after resetting the machine, the e09 error code persists, then it is time to call in a professional technician who can diagnose and repair any underlying problems with your dishwasher. Remember that regular maintenance can help prevent some errors from occurring in the first place, so make sure to keep up with your dishwasher’s upkeep as recommended by the manufacturer.


In conclusion, dealing with the Bosch dishwasher error code E09 can be frustrating, but it is not an impossible task. By understanding what this error code means and following the steps outlined above, you can quickly troubleshoot and fix the problem. Remember to always check for faulty heating elements and inspect the wiring harness before moving on to testing the control board or resetting the dishwasher.

Additionally, using proper detergent and maintaining a consistent water temperature can also prevent future errors from occurring. However, if all else fails or you do not feel comfortable troubleshooting on your own, seeking professional help is always an option. With these tips in mind, you can get your Bosch dishwasher running smoothly once again.

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Stella is the founder and chief editor of getdishwasher.com. For the last decade and a half, Her aim for this website was to help people make the right decisions for their dishwasher component upgrades.

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