Bosch Dishwasher Error Codes and Malfunctions

No matter how smoothly your appliances are working, we always recommend to check on and pay a bit more attention to their operation. Even the most reliable brands, such as Bosch sometimes falter. It is important to catch any potential malfunction as early as possible. No matter how we hope that some problems go away, they simply won’t resolve themselves.

If you want your appliances to serve you better:

  • Clean them up after use
  • Remove any debris, obstructions, leftovers
  • De-grease
  • Remove lint tray
  • Run cleaning cycles as per the manual
  • Watch for alignment
  • Watch for loose parts
  • Pay attention to any new and unusual noises and sounds
  • Watch for error codes
dishwasher repair

If you notice any consistent changes, check up with the professional technicians. While some things could be insignificant, others may be the signs of serious problems that will cause later a breakdown or, even result in fire.

We often get those calls when appliance owners are not sure about what the error codes mean, and here we have put some information all in one place:

Common Bosch Dishwasher Error Codes & Malfunctions

Bosch dishwasher diagnostic mode or test cycle

Bosch dishwasher test cycle is designed to help identify the problem in general. It takes the unit through the entire cycle to troubleshoot its main functions. Refer to the manual on how to run it. In most models, you have to make sure that the dishwasher is off and the diagnostic mode is activated by pressing and holding the Power Scrub Plus and Regular Wash buttons at the same time. The error code will show if there are any problems.

Error code display symbols are displayed as letter E (for error) and the two digit error code numbers. Please note that if you see numbers preceded by the letter H (for example H01), it is not actually an error, rather 3a washing time delay start. It means the wash cycle will start in one hour.

Bosch dishwasher beeping during cycle

Bosch dishwashers are designed to beep when there is an error. A beep means that your drain is not clogged, and the rest of the parts are functioning as they should. Beeping in the middle of the cycle points to the problem with the control board itself. Find the circuit breaker and turn it off for 60 seconds. If this does not help, your dishwasher will require a circuit board replacement.

Bosch dishwasher delay start problems

The most common delay start problem in Bosch Dishwashers is that the display gets stuck at 2hr, while it starts immediately. It points to the problem with the water heater. In this situation, in most cases, the connection with the heater relay has to be resoldered. It happens because the copper can not handle the heat well.

Bosch Dishwasher Error Code Numbers and Troubleshooting   

Error Codes:  E01, E02, E03, E04, E05

Power Module failure. In case any of these codes show up Bosch also locks down power modules so that they could be fixed only by a certified technician.

Error Code: E06

Door mechanism problem. Door switch or sensor is damaged and will need the replacement. Check for obstructions first

Error Code E07

Problems with the fan, or connection to the fan. You will also notice that dishes are still wet after the cycle stops.

Error Code E08

Water does not cover the heating element. It may point to the heating element problem or water obstruction, or water pump problem.

Error Code E09, E10

Water not heating. Problem with the heater, or connection to the heater. Also check if the heating element is free from lime buildup.

Error Code E11

Thermostat or temperature sensor malfunction. Most likely it will need the replacement

Fault Code E13

Water temperature heats up above 75C. Incorrect water connection. Make sure your water supply comes from cold water, not from hot water pipe. If the connection was correct, then it points to thermostat problem, when it fails to measure the temperature correctly, or fails to shut down the heating process.

Error Code E14

Reed switch flow sensor fault. Check the contacts to the reed switch

Error Code E15

Dishwasher base leaking water. Drain the water. Check for the breach points.

Error Code E16

Water inlet valve fault.

Error Code E17

Water level too high risk of overflow. Faulty sensor or drainage. Check both.  

Error Code E18

Insufficient water level. Faulty water valve

Error Code E20

Electrical short or breaker out. Usually points to the wiring of pump or motor

Error Code E21

Blockage of the circulating pump.

Error Code E23

Electrical short or breaker out caused by the drain pump wiring or faulty drain pump.

Error Code E24, E25

Draining problems. Check draining filters. E25 may also point to blocked drain pump

Error Code E26

Faulty Water switch/regulator.

Fault Code E28

Malfunctioning turbidity sensor. You will also notice that the dishes are not getting clean and will notice some debris in the tub.

There are also alternative letter error codes, identified with letters A, B, C, D etc. According to the manual, the letters point to exact parts problems.

We have listed the common error codes here to help you troubleshoot what you are comfortable with. But if you are not comfortable with it, of course, you should call a professional technician.

It helps us a lot when at the time of your call you mention the error code. It does help to troubleshoot and repair the problem faster. Call us if you have any questions about Bosch Dishwasher repair and error codes or other Bosch appliances repair.

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