Bosch dishwashers have a built-in diagnostic system that helps to obtain information about whether there are any problems and errors generated by it. Also, the mechanism is able to indicate whether replacement or verification is required. But not everyone knows what these or those error codes mean, for what reasons they appear, and what to do if they are found.
E0
This code is displayed when entering diagnostic test mode and retrieving fault codes from memory.
E1 or E2
This error is generated in case of a problem with the temperature sensor or with the thermostat. To gain access to it, you need to remove the front cover and find the thermistor directly under the tank.
E3
This code is displayed when the dishwasher is unable to fill with water. When the water supply is fully open and there is no water filling, you just need to disconnect the system and the machine itself from the network.
Also remove the water fill line and make sure the water supply valve is connected. If this is true, the water valve is replaced. It is not necessary to try to clear the screen, as the situation may be aggravated due to the risk of being stuck open due to debris.
E4
This error assumes a close and direct relationship with the water flow sensor and is caused by calcium deposits directly on the sensor wheel. It simply loses the ability to rotate and the ability to measure the amount of water entering the system. In this case, only the replacement of the element is required, it is impossible to clean it.
E5
This code is displayed when overflowing with water. To check it, you need to disconnect and reconnect the system. If the problem persists, the float switch must be checked.
E6
This code makes itself felt when a malfunction occurs in the water sensor, which is responsible for detecting a perfectly clean or, conversely, contaminated liquid, as well as monitoring its degree of turbidity.
E9
The code designation of such a plan appears when there is a problem with the heating element. In some situations, the point is soldering the heater relay directly on the control board.
E15
In this case, we can talk about leakage and triggering of the flood sensor. This could be due to one of the water hoses slipping off, or one of the clamps that hold them loose. All that needs to be done is to remove the machine from the place where it was standing, and then remove the panels located on the side. This approach will allow you to see where the leak is coming from.
E22
This error appears when water is stored in the pan due to clogging of the filter device designed for fine cleaning.
E24 or E25
Here you can talk directly about the drain error, which often appears if the corresponding pump is clogged. If it works, but there is no drain, you need to check the check valve to make sure there are no foreign objects in it. If you hear the pump buzzing, and there is no torsion, the impeller is probably clogged.
H24
This means a 24 hour delay. For the problem to be really solved, you need to deactivate the device by unplugging it, and then press and hold the start button for 10 seconds to reset it when you turn it back on.
How to troubleshoot a Bosch dishwasher
It is worth mentioning right away that the device is able to launch the test cycle. He, in turn, instantly goes through all the stages of the washing program to find out why the problem occurs. This allows the user to get a general idea of what is causing the problem.
The steps in which you need to take action to start the test cycle differ according to the model. However, the basis is identical for all models. Perhaps it is your system that lacks similar button markings compared to the one discussed below. In such a situation, you need to hold buttons with similar names. After a little trial and error, you will be able to find the right combination.
- First, you need to make sure that the dishwasher is turned off.
- Next, you need to press and hold the “Power Scrub Plus” button, as well as the “Regular Wash” button.
- After that, the dishwasher turns on and the buttons are released.
- The indicator above each of them necessarily flashes.
- The user starts the cycle in test mode by pressing the same buttons.
- Next, the trial version will start, and at the end of the cycle, an error code will be displayed if the system suddenly detects a malfunction.
Codes E01, E02, E03, E05
The most common reason for their appearance is a failure in the power supply. The programming of plug-in modules responsible for power supply is blocked by the manufacturer. For this reason, when the corresponding error code appears, be sure to contact the official representative of the brand’s service center.
How to enter the service testing program?
The controls include codes that are designed for factory testing, test programs, customer service. Before applying them, you need to check the test programs, as well as the error codes for your dishwasher.
After pressing any two cycle buttons, you need to turn on the device. Next, the LED “B” and “C” will light up, which will confirm the presence in the menu of special programs. To enter the test program, you must select the first option and hold the button of the same name until “P1” appears. When you press the “C” button, the program will be launched, the steps will be displayed on the digital screen.
The error codes that have been stored are finally displayed on the digital display, as well as on the LEDs. The test program can only be stopped or reset by pressing a specific button. You can find the codes using a special customer support service system.
If the dishwasher is not equipped with a digital display, it will display a light type indicator for each specific error code. If their number is large, a code with a high priority appears. The controls retain the codes of the last cycle. Much depends on the specific model.
If, for example, the code E5 indicates that the water level has reached a safe level, the float and switch must be checked, and that the water is at the base. You also need to check that the valve does not move after closing. To clear the codes, you need to run a program designed to test customer service.