Bosch Dishwasher Error Codes – Dishwasherguys

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Everyone loves the convenience of a dishwasher. It’s a great tool that saves time and effort, especially after a big family meal. But what do you do when your trusty Bosch dishwasher flashes an unfamiliar error code? It can be a moment of confusion and frustration.

Don’t worry! Understanding these “Bosch dishwasher error codes” can be simpler than you think. In this guide, we’ll break down common codes, what they mean, and how you can address them. So, the next time your dishwasher gives you a puzzling message, you’ll be armed with knowledge and confidence to tackle the issue. Here is the table of error codes, which we will resolve in this guide!

Error CodeDescription
E0Diagnostic test mode
E01Pump control circuit or temperature sensor issue
E02Heater relay or temperature sensor issue
E03Faulty auxiliary heater relay or water fill issue
E04Heating system or water level sensor issue
E05Water switch Triac fault or float issue
E06Door mechanism failure or turbidity sensor issue
E07Drying issue
E08Sudden loss of water during the cycle
E09Defective heater or heating relay
E12Too much limescale in the heat pump
E15Dishwasher detected a leak
E22Residual water in sump, filter blockage
E23Drainage issue
E24Drain filter blocked
E25Drain pump blocked or pump cover loose/missing
OtherLess common error codes (E10, E11, E13, E14, E16, E17, E18, E19, E20, E21, E26, E27, E28, E29, E30)

Bosch Error Code E0

Your dishwasher is in a special check-up mode. This is alright. Just turn it off and on again to go back to normal.

Control Board Issue:

If your Bosch dishwasher is acting weird, the problem might be its “brain” (control board). It’s good to have someone who knows about this look at it. It can cost a lot if you need a new “brain” for it. So, ask an expert first before you pay.

Bosch Dishwasher Error: E01

What’s it about? There needs to be a solution with the part that controls the pump or checks the temperature.

What to do: Most times, when you see this error, you need a Bosch expert to look at it.

Is your dishwasher not getting hot? Use a multimeter tool to see if the temperature-checking part is broken. If the multimeter shows “OL”, you need a new one.

For more checks, there’s a guide for your dishwasher. It will tell you how the temperature-checking part should work at different temperatures.

Error code E02

What’s Going On?

This error tells you that the part controlling the heating inside the dishwasher (the heater relay on the control board) isn’t working properly. Another possibility is that the little device that checks the water temperature (known as a thermistor) might have problems.

How to Fix It:

For this issue, the best action is to follow the suggestions mentioned for the E01 error. Generally, this involves checking the dishwasher with specific tools or contacting a professional.

Error code E03

What’s Going On?

This code means one of two things. First, a backup part that assists in heating the water (an auxiliary heater relay) on the main control board might need to be fixed. Secondly, the dishwasher might need the water to wash your dishes.

How to Fix It:

If you realize that water isn’t coming into your dishwasher, the issue might be with the water inlet valve (this is like a gate that lets water come in). Replacing this should solve that problem. On the other hand, if the issue seems more complex and might be related to the main control of the dishwasher, it’s a good idea to get in touch with a Bosch technician. They’ll be equipped to identify and solve the problem.

Error code E04

What’s Going On?

There’s a problem with the system that heats the water or the part that senses the water level.

How to Fix It:

First, tilt the dishwasher a bit. This can help move any stuck water in the base. If the error still shows up, it might be an issue with the heating system. In this case, a Bosch technician should come and take a look.

Error code E05

What’s Going On?

There’s an issue with a switch related to water or a problem with a floating part that senses water levels.

How to Fix It:

Often, this means there’s a problem with the main control inside the dishwasher. But before calling an expert, you can check the float and its switch for any visible damage. You can also use a multimeter tool to see if the float switch works correctly. If any of these parts are broken, they’ll need replacing.

Error code E06

What’s Going On?

The door isn’t locking properly, or, in some models, a sensor that checks water clarity (turbidity sensor) might be broken.

How to Fix It:

This is a tricky error. The dishwasher might need to be taken apart to fix it. It’s best to call a technician to figure out the problem and sort it out.

Error code E07

What’s Going On?

The dishes should be drying better.

How to Fix It:

First, take a look at the fan used for drying. Check if it’s damaged, or use a multimeter to see if it’s working right. If the fan is fine, look at the wires connecting it to the main control to see if they’re damaged. If you find any issues, they’ll need fixing or replacing.

Error code E08

What’s the Problem?

The dishwasher noticed it lost water suddenly during washing.

How to Fix It:

Stop the cycle and see if dishes have flipped over and trapped water. If that’s not the cause, check the main washing area and the part that heats water for leaks. Another thing to check is the hose that lets water in; it might be twisted, or the water gate might be broken.

Error code E09

What’s the Problem?

There’s an issue with the heater or the part on the control board that controls the heater.

How to Fix It:

You can use a multimeter tool to check if the heater works correctly. A guide for your dishwasher will tell you what the heater’s readings should be. If you’re unsure, it’s best to call a Bosch expert to inspect the control board.

Error code E12

What’s the Problem?

This means there’s too much limescale in the heat pump.

How to Fix It:

You can fix this using the Bosch descaler, which helps clear out limescale. Get the descaler here. Limescale builds up in dishwashers, especially with hard water. Regularly removing it ensures your dishes get cleaned properly. You can find the descaler use instructions here. If your dishwasher supports it, use softening salt. This prevents limescale build-up.

Error code E15

What’s the Problem?

The dishwasher thinks it’s leaking somewhere.

How to Fix It:

First, look around the dishwasher for any signs of water leaks. If everything seems dry, the problem might be with the leak sensor below the washing area or too much water in the drain pan at the bottom. You might need to remove water from there or replace the sensor if it’s faulty.

Bosch Dishwasher E22 Error Code

If an error appears in your Bosch dishwasher display, it means that the filter of your machine is blocked. This filter is blocked due to the food residue, and it needs to be cleaned. Whenever you see an error of E22 if so, don’t worry. Check the filter to see if it’s full or not.

How To Remove The Dishwasher Filter

The filter has to be removed to clean the dishwasher filter, and it is located in the bottom area inside the dishwasher.

  • Remove the lower rack and spray arm to remove the filter.
  • Now twist your filter anticlockwise and pull it out with a mesh screen.

What can I do to solve the E22 Error Code On my dishwasher?

After removing the filter, you need to clean it up with mild soap and a soft brush, wash it under running water, clean it and reinstall it.

How to clean the dishwasher filter?

  • Remove the lower rack and spray arm of the dishwasher.
  • Now turn your filter towards Anti clockwise and pull it out through the mesh screen.
  • Clean the filter under running water with mild soap and a soft brush.
  • Now apply the filter and spray arm back to the dishwasher.

Why do I need to clean the dishwasher filter?

The filter is where food particles get trapped, and by cleaning it, you can avoid overflowing. Your machine will work well, and you will avoid any problems that may arise in the future.

  • Keeping the filter clean can protect the pump from filling with food residue.
  • You can get rid of the overflow problem.
  • So that the food particles do not get on the dishes again.

Error codes E23, E24, and E25

What’s the Problem?
The dishwasher isn’t draining water properly. This can be because the drain pump is broken or the hose that removes water is blocked.

How to Fix It:
First, look at the drain hose and the pump to see if they’re blocked or damaged. The pump has a part that spins (called an impeller) – if that’s broken, you’ll need a new pump. You can also use a tool called a multimeter to check the pump. If the multimeter test shows a problem, the pump should be changed.

Less Common Dishwasher Error Codes:


Problem: The dishwasher heats up too slowly.

Fix: Run a thorough cleaning cycle using a dishwasher cleaner. If the issue stays, the heater might need to be changed.


Problem: There must be an issue with the part that checks the temperature.

Fix: This part’s resistance needs checking to determine what’s wrong.


Problem: The water in the dishwasher is too hot.

Fix: Ensure the dishwasher uses cold water and the temperature checker works fine.


Problem: The part that senses water coming in isn’t detecting anything.

Fix: The sensor might be broken, or there’s a problem with the water supply.


Problem: The dishwasher is getting water when it shouldn’t.

Fix: Changing the part that lets water in (water inlet valve) should solve this.

E17 or E18:

Problem: The dishwasher isn’t getting any water.

Fix: Make sure water can get to the dishwasher. If there’s still a problem, the water inlet valve might need replacing.

E19, E20, E21:

Problem: There’s a heating issue.

Fix: The parts that help with heating need to be checked.


Problem: Something must be fixed with a specific motor (the diverter motor).

Fix: This motor needs to be inspected for issues.

E27, E29, E30:

Problem: There’s an issue with the power going to the dishwasher.

Fix: Try unplugging the dishwasher and plugging it back in after 5 minutes. If it doesn’t work, call a technician.


Problem: There needs to be a solution with the Aqua sensor.

Fix: This is like the E06 error, so look at that solution.


How to Reset a Bosch Dishwasher Error Code?

  1. Locate the Start button on your Bosch dishwasher, which often doubles as the reset button (sometimes labeled “reset”).
  2.  Hold this button for at least 3 seconds until the screen resets. If the dishwasher was running, you should hear it start draining.
  3.  If this method doesn’t work or there’s no reset button, unplug the dishwasher from its power source for at least a minute.
  4.  Plug it back in, and if needed, adjust the settings or restart the dishwasher.

What is a Bosch dishwasher error code?

It’s a code on your dishwasher’s screen indicating an issue that needs attention.

Are these error codes the same for all Bosch dishwasher models?

Most codes are consistent across models, but checking your user manual or consulting with Bosch directly for model-specific information is always a good idea.

How often should I clean or check my dishwasher components?

Regular maintenance can prevent many issues. It’s good to clean filters and check components every month.

What should I do if I can’t resolve the issue with the error code?

Contact a Bosch technician or a professional appliance repair service for assistance.


Understanding your Bosch dishwasher’s error codes ensures it runs smoothly and efficiently. While it’s easy to feel overwhelmed when faced with these codes, you can keep your appliance in top shape with a little knowledge and regular maintenance. Always remember that if an issue feels out of your depth, there’s no harm in calling the experts to ensure your dishwasher’s longevity and performance.

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Ubaid Hassan
Ubaid Hassan

Introducing Ubaid Hassan – the expert who knows all about fixing dishwashers. Ubaid understands how dishwashers work and is really good at finding and solving problems. Ubaid is the person to ask for helpful advice and solutions. Loving both dishwashers and taking care of the environment, Ubaid can share smart ideas to help you use your dishwasher well and be kind to nature.

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