Error i40 in Electrolux dishwasher

When an Electrolux dishwasher stops working and error i40 lights up on its display, some housewives panic, not knowing what to do. There is never any need to panic. Error i40 in an Electrolux dishwasher may be the result of a system failure, which can be resolved by simply rebooting the unit. If rebooting does not help, you need to try to decipher the code and understand what could have caused it to appear. We will definitely help you with this.

Why does this code appear?

Why does error code i40 appear? In fact, there are two main reasons: a faulty, clogged pressure switch (level switch) or a broken control module. Let's take a closer look. The dishwasher pressure switch determines the amount of water that is poured into the dishwasher. If the device is working, but its tube is clogged, it sends an alarm signal to the control module. The module, in turn, recognizes this signal and issues an i40 error.

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

In the second case, it is OK. It sends operating signals to the control module, but it cannot recognize them and issues an i40 error. The inability to recognize pressure switch signals may be caused by a burnt out tire or broken firmware; here you will need to understand the diagnostic process. One way or another, the control board will need to be removed and tested, that's for sure. 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 repairs?

It is advisable to start checking with the level relay. Firstly, it is simpler, and secondly, according to statistics, it is pressure switches that most often cause such an error.

1. Disconnect the dishwasher from all communications.
2. We take it out to a convenient place, laying it with a well-absorbing rag.
3. We remove the side walls of the case.
4. Place the dishwasher on its side.
5. We unscrew and move the tray a little to make it easier to get to the internal parts.
6. Disconnect the pressure switch, carefully removing the power wires.

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

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

If the level sensor turns out to be fully operational and not clogged with dirt, you can check the wiring supplying it. Perhaps one of the supply wires has broken or frayed, which has caused a “break in communication” between the control module and the pressure switch. It is best to ring each transaction, but visual inspection has not been canceled either.

Lastly, we deal with the control module. Quite often, Electrolux machines released in the last five years have problems with the firmware. It either “glitches” or “flies” completely. The solution to the problem is to reflash the board. But in order to do such a flashing, it is necessary to check the physical condition of the control board. In our opinion, only an experienced specialist can do this professionally. He will reflash the module, replace burnt tires and solder the tracks.

It is very difficult to do this correctly with your own hands, without experience in such matters. A makeshift repair can result in a complete breakdown of the control board, and a new part is very expensive.

In conclusion, we note that if error i40 occurs, it would be advisable to carefully check the pressure switch, and if this part turns out to be in working order, then invite a specialist. A specialist will examine the problem on the spot and, if necessary, “pick” the control board; you shouldn’t try to get to it yourself. If your “home assistant” produces some other errors, read the article Electrolux dishwasher error codes, she will help you figure it out. Good luck!

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