Diagnostics for dishwashers

When the dishwasher breaks down, it is always unpleasant, because you quickly get used to the good and do not really want to wash the dishes with your hands. There is a desire to quickly fix the "iron assistant", and ideally without spending a penny. Where to begin? Well, of course, with car diagnostics and troubleshooting. In essence, the diagnosis is largely carried out by the dishwasher independently, the main thing is to be able to understand its actions and draw the right conclusions. This will be discussed in the article.

Does the dishwasher help find a breakdown?

The manufacturer has made sure that the dishwasher itself can detect malfunctions and tell the consumer about it. The control module contains a special software algorithm that allows you to immediately identify it in case of any malfunction and display it in the form of a specific code.

Note! If the dishwasher does not have a display, then information about the malfunction is displayed using the indicators highlighted in a certain order.

The self-diagnosis program is well developed in dishwashers:

• Bosch
• Electrolux,
• AEG
• Miele
• Ardo,
• Ariston
• Beko and others.

In the framework of the article, we will consider how diagnostics are performed in Bosch and Electrolux machines. The principle of error recognition is approximately the same for everyone, but the depth of analysis and the accuracy of determining the malfunction depends on the brand, model, generation of the control module and many other factors. But one thing is for sure, in all modern dishwashers there is a self-diagnosis system, and it is of great benefit to both users and experienced craftsmen.

The most common faults and their codes

Most of the fault codes for Bosch or Electrolux dishwashers are designed for fairly rare breakdowns, you are unlikely to encounter them, but some are found constantly, we will pay special attention to them. The following common mistakes are embedded in the Bosch dishwasher.

1. The injected water remains cold - an error with code E1.
2. There are problems with the pressure switch - an error with the code E2.
3. Too much water in the dishwasher - error code E5.
4. The aquasensor is disabled - an error with code E6.
5. The heating element - code E9 is out of order.
6. The Aquastop system worked or broke, a blockage formed in the system - code E15.
7. No water comes into the Bosch dishwasher - code E17.
8. The pump does not work at all or the pump does not function normally - codes E21, E24.
9. Low voltage in the electrical network - code E27.

In fact, in the memory of the dishwasher Bosch made a lot more mistakes and, accordingly, codes for them, if you take the most modern models, they are able to recognize more than 200 different breakdowns. But the above errors are still the most relevant. Electrolux is not far behind its direct competitor Bosch, constantly improving the self-diagnosis system of its dishwashers. Here are the common error codes for an Electrolux dishwasher.

• Problems with water entering the dishwasher - the END indicator + code i blinks 1 time
• Water drainage is difficult or absent - the END indicator + code i will blink 2 times
• The system that prevents the overflow of water into the dishwasher has worked - the END indicator + code i will blink 3 times
• Water heating is not carried out properly or is not carried out at all - the END indicator + code i will blink 6 times
• Somewhere in the system there was a blockage - the END indicator + E20 code blinks 2 times.

Important! The letters before the digital error code will depend on the model of the Electrolux dishwasher, see the instructions.

About decryption of malfunctions and their elimination

We talked about the self-diagnosis system of Bosch and Electrolux dishwashers.They indicated the most common error codes, now we have only to decipher these errors and outline ways to eliminate them. As part of this narrative, we will do it overviewly, but if you want more detailed information about a specific error, visit other pages of our site. In particular about E24 error in a Bosch dishwasher You can read in the article of the same name.

Errors E1, i60. These system errors tell the user and the master that the heating element or its electrician is faulty in the dishwasher. First you need to try to run different washing programs.

If the ten does not work on all programs, it means that you have to disassemble the dishwasher and check the unit with a multimeter. A value within 1,500 Ohms indicates that the unit is working, if it means much less, the ten will have to be changed.

E2 and i30. If the machine gives such errors, it means that there are certain problems with the water level sensor. Perhaps the sensor itself is working, but the contact that interrupts its power supply is faulty, it’s hard to say exactly until you look at this part with your own eyes and make sure. Sometimes it’s enough to simply blow out the pressure switch, and it will work, and sometimes a sensor replacement is required.

Note! Hard water has a devastating effect not only on filters, pump or circulation pump, but also on the pressure switch, so do not be surprised that limescale can remain on this sensor.

E21, E24 and i20. These errors "pop up" when it comes to any problems with draining the water. In this case, the operating mode of the dishwasher does not matter. The pump may not work, or it may be completely serviceable, and it will not be able to pump out water, for example, due to a pinched hose, a clogged filter, or for some other reason. Again, you will have to perform a series of actions described in detail in the article Dishwasher does not drain water - what to do?

E15 and E20. These codes indicate 2 categories of errors, different in nature, but the same for a dishwasher in recognition features - clogging and triggered Aquastop. Why are these errors the same in terms of recognition?

1. And in fact, and in another case, water can not get into the dishwasher.
2. In both the first and second cases, the control module regularly issues a command to fill the water, but receives the same response from the pressure switch.
3. And in fact, and in another case, clogging of the water path occurs. Only in the case of Aquastop, the tract closes abnormally with a valve - this is due to the mechanism. In the event of a blockage, blockage of the tract occurs spontaneously with the help of compressed dirt or lime deposits.

The problem is solved quite simply. If the Aquastop hose has worked, then it must be changed to a new one, the old one cannot be repaired. In the case of a blockage, both chemical and traditional cleaning will help - with your own hands.

Summing up, we note that the primary diagnosis of the dishwasher “lies on the shoulders” of the dishwasher itself. The manufacturer tried so that in almost any breakdown, the machine itself could inform the user that it had broken, thereby greatly facilitating his life!