Bosch Dishwasher Error Codes

Image of a washing machine with dishes

In the past, determining what was wrong when a dishwasher malfunctions was difficult to do. Now, troubleshooting your dishwasher has been made a little easier thanks to the error codes which help you resolve the problem on your own. There are some instances where you will still need to have a professional troubleshoot your dishwasher problem, however, we have compiled a list of Bosch dishwasher error codes to help you know what the issue might be.

Error Codes Solutions
E01, E02, E03, E04, E05 These codes mean that the dishwasher has a power module failure. This is not a problem that you can solve on your own. Replacing power modules will require a Bosch-approved technician.
E06

This indicates an issue with the dishwasher door. A switch/sensor is responsible for ensuring that the door is locked before a cycle begins. If the sensor or switch is faulty or damaged this error code will show.

Check to see if there’s anything obstructing the door and preventing it from closing properly. Also check for damage to the sensor/switch and replace if necessary.

E07

Faulty fan issue. This error code shows that the dishes are not drying because the fan is not operating properly. This could be due to a number of reasons including:

  • Not loading your dishwasher properly
  • Using the wrong type of detergent and rinse aid
  • A technical fault

Make sure you are loaded your dishwasher properly and using the correct type of detergent and rinse aid.

If this is not the problem, place a service call to have a technician troubleshoot the issue.

E08

The water is not filling up above the heating element. This could be an issue with the heating element itself but could also be caused by a variety of other issues.

Check your water supply connection to make sure that water can flow into your dishwasher. Make sure that the top on the hose is open. Also check your water inlet valve and your float switch to ensure both are in working condition.

E09

This is a water heating problem. It could be the result of a faulty water heating element that needs to be replaced.

Although it is usually a reliable part, it can burn out over time.

This problem could also be a result of the thermostat not functioning properly. Use a multimeter to test the thermostat to determine whether it is functioning properly.

It could also be a problem with the hot water supply.

Check the components listed above for damage and replace it necessary.

E10 Heating element issue. There could be some blockage or buildup that is interfering with the efficiency of the heating element. Check for such blockages or buildup and remove.
E11 Faulty thermostat or temperature sensor. Check for damage and replace the faulty part if necessary.
E13 Water temperature is too high. If the water temperature is above 75 degrees Celsius in your dishwasher, it will cause this error code. The solution is simple: if your dishwasher is connected to a hot water supply, simply switch it to cold water.
E14 Faulty reed switch flow sensor. This could be caused by some buildup. Check the contacts on the reed switch connection to ensure they are clean.
E15 Water leak. This indicates that there is water leaking from the dishwasher base. To resolve this, empty out the water from the base. If error occurs again, your dishwasher has a leak. Call a technician to fix the leak.
E16

Water inlet valve fault. The water inlet valve is located behind the panel under the dishwasher door and is responsible for ensuring the appropriate amount of water fills into the dishwasher.

If this part is faulty, it will need to be replaced. But before doing so, take it apart to ensure that there is no debris blocking the screen.

E17 Water level is too high. This could mean that the flow sensor is malfunctioning or there is a drainage issue.
E18 Water level is too low. A likely cause is a faulty water valve that will need to be replaced. It could also indicate a problem with the water supply. Check to make sure there is no problem with the water supply connection.
E20 Electrical short or break. This can result in an incorrect resistance in winding of the circulation pump or the motor.
E21 Circulating pump blocked. This is due to some blockage between the motor or the pump causing insufficient water flow. Check for signs of blockage and remove any debris.
E23

Similar to error code E20, but the difference is that this electrical problem is with the drain pump.

Replace drain pump if necessary.

E24

Dishwasher not draining properly. Likely due to a blocked drain filter.

Clean the filters of any debris.

E25 Dishwasher not draining properly. It could be caused by blocked filters, as mentioned above. Another cause could be a blocked drain pump. Check the drain pump and remove any blockage.
E26 Water switch/regulator problem. Check the water switch and replace it if necessary.
E28 Faulty turbidity sensor. This will result in dishes not getting clean or dirty water in the tub. Check the turbidity sensor and replace if necessary.
Code A or B Faulty water sensor. Check the dishwasher for signs of a leak and check if the anti-flood protection has been activated.
Code C Motor tacho fault. Inspect the motor and motor tacho wiring for and visible problems.
Code D

Wiring/electrical fault related to motor triac.

Check the wiring on the PCB and motor. Also check the triac on the PCB.

Code E

Diverter valve fault. This valve directs water to the top or bottom rack only when the half load option has been selected.

Check the diverter valve and its wiring for any signs of a problem.

Code F

Fill timeout. The water level has not reached the appropriate level within six minutes of starting the cycle.

This could be a problem with the water supply connection. (See Error Code E08)

Code G Diverter triac fault. To fix, check the diverter triac on PCB and its wiring.
Code H Dishwasher not heating. This could be due to a faulty heating element or thermostat, or wiring issue. (See Error Code E09)
Code K Faulty thermostat sensor (NTC). Check the NTC and thermostat to make sure there is no issue with the wiring.
Code 0 Pressure sensor fault. Inspect the pressure sensor and its wiring for any sign of problem.

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