Electrolux dishwasher error code i40

When an Electrolux dishwasher stops working and the i40 error message appears on its display, some homeowners panic, unsure what to do. There's no need to panic. An i40 error message in an Electrolux dishwasher may be the result of a system error, which can be resolved by simply restarting the machine. If restarting doesn't help, you should try to decipher the code and figure out what could have caused it. We're here to help.

Why does this code appear?

What causes the i40 error code? There are actually two main causes: a faulty, clogged pressure switch (level relay) or a broken control module. Let's take a closer look. The dishwasher pressure switch determines the amount of water filled into the dishwasher. If the device is working properly but its tube is clogged, it sends an alarm signal to the control module. The module, in turn, recognizes this signal and generates error i40.

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

In the second case, it's working properly. It sends working signals to the control module, but the control module fails to recognize them and returns the i40 error. The failure to recognize the pressure switch signals could be caused by a burnt-out bus or faulty firmware, which would require further investigation during diagnostics. Either way, the control board will definitely need to be removed and tested. The pressure switch will also need to be thoroughly checked before deciding how to fix the problem yourself.

How to make repairs?

It's a good idea to start testing with the level switch. Firstly, it's simpler, and secondly, statistically, pressure switches are more likely to cause this error.

1. We disconnect the dishwasher from all communications.
2. We take it out to a convenient place, laying down a highly absorbent cloth.
3. We remove the side walls of the case.
4. We put the dishwasher on its side.
5. We unscrew and move the tray a little to make it easier to access the internal parts.
6. We disconnect the pressure switch, carefully removing the power wires.

Next, you need to blow out the pressure switch tube, or even clear it if it's clogged. Test the sensor with a multimeter to ensure it's working properly. Depending on the test results, we'll either replace the faulty part with a new one or replace it and move on to the control module.

Perhaps blowing out the pressure switch tube solved the problem. Then we simply reassemble the machine, connect it, and check that our "home assistant" is working properly.

If the level sensor is fully functional and not clogged with dirt, you can check the wiring supplying it. It's possible that one of the wires has broken or frayed, causing a "break in communication" between the control module and the pressure switch. It's best to test each wire, but a visual inspection is also recommended.

Lastly, we address the control module. Electrolux washing machines manufactured in the last five years often experience firmware issues. The firmware sometimes glitches, sometimes crashes entirely. The solution is to reflash the board. However, to do this, you need to check the physical integrity of the control board. In our opinion, only an experienced specialist can do this professionally. He will also reflash the module, replace burnt tires and solder the tracks.

Doing this correctly yourself without experience is very difficult. A home-made repair could result in complete failure of the control board, and a new part is very expensive.

In conclusion, if the i40 error occurs, it's a good idea to thoroughly check the pressure switch. If this part is found to be working properly, then call a technician. A specialist will examine the problem on-site and, if necessary, tinker with the control board; you shouldn't attempt to access it yourself. If your "home assistant" is displaying any other errors, read the article. Electrolux Dishwasher Error Codes, she'll help you figure it out. Good luck!

   

Readers' comments