Bosch Dishwasher Error Codes: How to Fix Them

Fleet Appliance
October 2, 2023
Bosch Repair

Have you ever gotten an error message on your Bosch dishwasher and felt completely clueless about how to fix it? 

Error codes happen on any appliance, and Bosch dishwashers are no exception. When they do happen, it’s important to know what these error codes mean and how to fix them to avoid any potential damage. 

In this article, we will go through the most common error codes on Bosch dishwashers, what causes them, and how to fix them.

1. Error Code E16 and E17: Water filling system errors & E18: Water flow into the dishwasher error

Error Codes E16, E17, or E18 on a Bosch dishwasher means that there is a problem with the water supply. This could be due to a damaged or clogged water inlet hose or a kink in the hose. 

To fix this, you should first ensure that the water valve is fully open, that water is flowing, and that the water inlet hose is not kinked. 

If that doesn’t work, you may need to replace the water inlet valve. 

If the water inlet hose is kinked or damaged, you will need to replace the water inlet hose.

2. Error Code E24: Dishwasher not draining error

Error Code E24 on Bosch dishwashers suggests that there is a problem with draining the water from the dishwasher. This could be due to the filter being clogged, a kink or blockage in the drain hose, or even an issue with the drain pump.

In this case, you should clean the filter first to remove any blockages.

Next, check the dishwasher drain hose for any kinks or blockages and ensure that they are removed. 

If that doesn’t work, try cleaning the drain pump filter. If this still doesn’t work, you may need to call a professional.

3. Error Code E15: Water in the base of the dishwasher error

Error Code E15 means that the dishwasher has a water leak, and water has gotten out of the tub and into the bottom of the dishwasher. This could be due to many reasons, including a worn-out door seal, a failed water inlet valve, or a damaged water hose. 

First, try to locate the source of the dishwasher leak and repair it. Start by checking your water inlet and drain hoses for any leaks.

If the hoses are fine, you can find the source by looking at the bottom of the dishwasher. Check for any holes or damage to the tub itself.

Before the next step, turn off the power to your dishwasher.

Next, remove the kickplate at the base of the washer and inspect the components for any leaks, loose connections, or damage.

When you’ve found the source of the leak, you will need to fix it by either tightening a connection or replacing the damaged part.

Once you’ve fixed the leak, plug the dishwasher back in. Run a cycle to see whether the leak reoccurs.

If the error message persists, call a professional.

4. Error Code E23: Issue with drain pump error or E25: Drain pump blocked, drain issue, filter clogged, or pump impeller is jammed error

Error Code E23 indicates an issue with the drain pump in your dishwasher. This could be due to a faulty pump, a clogged filter, or a blocked drain hose.

Error Code E25 means that there is an issue with the drain pump, filter, drain, or impeller.

To troubleshoot both of these errors, begin by checking the drain pump and its connections for any obstructions or damage. If everything looks fine, try cleaning the filter and removing any blockages from the drain hose.

If the error persists, it is possible that the drain pump itself needs to be replaced. In this case, it’s best to contact a professional for assistance, as replacing a dishwasher’s drain pump can be complex and potentially dangerous.

In addition, regularly cleaning your dishwasher’s filter and removing any debris from the drain hose can help prevent this error in the future.

5. Error Code E12: Limescale buildup error

Error Code E12 indicates a limescale buildup in your dishwasher. Limescale is a hard, white deposit that can accumulate on the inside of your dishwasher due to hard water or lack of proper maintenance.

To address this issue, begin by running a short, empty cycle with a cup of white vinegar added to the bottom of the dishwasher. This will help dissolve any limescale buildup.

You can also try using a commercial dishwasher cleaner specifically designed to remove limescale.

In future, make sure to regularly clean your dishwasher and descale it if you have hard water. This will help prevent limescale buildup and keep your dishwasher running smoothly.  

If the error code persists after taking these steps, it is best to consult a professional for further assistance. They may be able to provide more specific advice or suggest additional solutions for your particular dishwasher model.

It is also important to note that limescale buildup not only affects the performance of your dishwasher but can also cause damage to your machine over time if left untreated.

6. Error Code E22: Filter is clogged error

Error Code E22 indicates that the filter in your dishwasher is clogged and needs to be cleaned. The filter plays a crucial role in catching food and keeping it from clogging the drain or damaging the dishwasher’s components.

To resolve this issue, start by removing the filter from your dishwasher and rinsing it under running water. Use a soft dish brush to gently scrub away any stuck food particles or debris. Once clean, replace the filter and run a short test cycle to see if the error code has been resolved.

If the error persists, it is possible that there is a larger issue with your dishwasher’s drainage system. See the above advice for errors E23 and E25 for more information on how to check the drainage system.

In conclusion, understanding the error codes on your Bosch dishwasher can save you a lot of headaches and money when it comes to repairs. It’s always best to troubleshoot any problems as soon as they arise, and by doing so, you can avoid more significant and costly repairs later on. Always make sure to read your dishwasher’s manual for more detailed information and troubleshooting tips. If you’re unsure about any repairs and feel like you need professional help, don’t hesitate to call a certified technician.


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