Error i40 in the dishwasher Electrolux

When the Electrolux dishwasher stops working, and the i40 error lights up on its display, some housewives panic, not knowing what to do. Panic is never necessary. The i40 error in the Electrolux dishwasher may be the result of a system failure that can be fixed by simply restarting the unit. If the reboot did not help, you need to try to decrypt the code and understand what could possibly have caused it to appear. In this we will definitely help you.

Why does this code appear?

For what reason does the i40 error code appear? In fact, there are two main reasons: a faulty, clogged pressure switch (level switch) or a broken control module. Let's understand in more detail. The pressure switch of the dishwasher determines the amount of water that is poured into the dishwasher. If the device is serviceable, but its pipe is blocked, it sends an alarm to the control module. The module, in turn, recognizes this signal and generates an i40 error.

Error i40 appears if the level sensor is burnt out and does not give any signals at all.

In the second case, it is working. He sends the working signals to the control module, but he can not recognize them and gives an i40 error. The impossibility of recognizing the pressure switch signals can be caused by a burned-out bus or a flashing firmware, here you will already need to understand the diagnostic process. One way or another, the control board will need to be removed and tested, this is unique. You will also need to carefully check the pressure switch, and only then make a decision on how to fix this problem on your own.

How to make a repair?

It is advisable to start the test with a level switch. Firstly, it is simpler, and secondly, according to statistics, it is pressostats that often cause such an error.

1. We disconnect the dishwasher from all communications.
2. We take it out to a convenient place, laying a well-absorbing rag.
3. We remove the side walls of the body.
4. We put the dishwasher to one side.
5. We turn off and shift the pallet a little, so that it is more convenient to get to the internal parts.
6. We disconnect the pressure switch by carefully removing the supply wires.

Next, you need to blow out the pressure switch tube, or even clean it if it is clogged. You need to ring the sensor with a multimeter and make sure that it works or does not work. We proceed further depending on the result of the test, either we replace the defective part with a new one, or put it in its place and go to the control module.

Perhaps blowing the pressure switch tube helped solve the problem. Then we just collect the machine, connect it and make sure that the “home assistant” is working.

If the level sensor turned out to be completely serviceable and not clogged with dirt, you can check its wiring. Perhaps one of the supply wires has broken or frayed, which caused a “disconnection” between the control module and the pressure switch. It is best to ring each transaction, but no one canceled the visual inspection.

The last thing we do is the control module. Quite often, Electrolux cars released in the last five years have problems with firmware. It is either “buggy”, or “flies” at all. The solution to the problem is flashing the board. But in order to do such a flashing, it is necessary to check the physical health of the control board. In our opinion, only a specialist with experience can do this professionally. He will reflash the module, replace the burnt tires and solder the tracks.

Do it yourself with your own hands, having no experience in such matters, is very difficult. Handicraft repairs can result in a complete breakdown of the control board, and a new part is very expensive.

In conclusion, we note that if an i40 error occurs, it would be advisable to carefully check the pressure switch, well, if this part is working, then invite the master.The specialist will study the problem on the spot, and if necessary, "pick" the control board, you should not climb on it yourself. If your “home assistant” gives out any other errors, read the article Electrolux Dishwasher Error Codes, she will help to figure it out. Good luck