Why does error e4 occur in a dishwasher? We understand the situation with a professional

When error e4 occurs in a dishwasher, the reason is most likely related to the pressure switch or valve that opens when water is supplied. To make sure of this, you need to check the parts by first removing the panels. How to do this is described step by step in the presented article.

Main causes of malfunction

If the dishwasher shows error E4, this means that excess water has accumulated in the chamber. The situation is quite dangerous, since excess can leak onto the floor, especially if there is no complete protection system. Main reasons 3:

1. The pressure switch is broken - this is the name given to the sensor that determines the liquid level.
2. There is a malfunction in the fill valve supplying water.
3. Error E4 also appears in the dishwasher due to a system failure.

The last reason is the easiest to repair. It is observed in the event of a sudden voltage drop, when the light “flashed” or completely turned off for some time. If a similar situation occurs for the first time, you just need to disconnect the device from the network and wait 15 minutes, then turn it on again.

If this does not help, and the Krona dishwasher shows error E3 or E4, then the reason is due to a malfunction of the main elements that control the water level. We are talking about the sensor and the fill valve.You can check them and carry out repair work yourself.

Pressostat repair

When a Krona dishwasher gives an error e3, this indicates a malfunction of the drain system. You can simply check the hose and other elements, and if necessary, clean them of food debris and other debris. But if code E4 appears, you need to check and, if necessary, replace the pressure switch. You should proceed like this:

1. Disconnect the unit from the network, disconnect it from the water supply, first turning off the tap.
2. Remove all plates and baskets in which they are placed.
3. When the Kron dishwasher shows error E4, the unit is carefully pulled out and placed on the back panel.
4. Remove the bottom panel and find a plastic box with contacts suitable for it, as shown in the photo.
5. When a Kaiser dishwasher gives an E4 error, connect a multimeter and measure the resistance of the device. If it shows 0, the element is good. If not, replacement is required.
6. They purchase exactly the same sensor and install it, connect the wires. Reassemble all the parts in the reverse order and put the unit in place.
7. If after this the Krona dishwasher shows error E4, you need to check the fill valve.

Fill valve repair

The valve is an important part that regulates the flow of water into the chamber. It has a membrane that is closed by default. But after connecting, it receives an impulse, after which it opens and allows water to fill. In the event of a breakdown, the Leran dishwasher shows error E4, and water overflows the chamber, threatening a leak.

To name the exact reason, you need to understand that the valve consists of a mechanism and the electronics that control it. For diagnosis and repair, proceed as follows:

1. When error E4 appears in the dishwasher, you need to turn off the power and turn off the tap.
2. Disconnect the hose through which the water flows, having previously placed a basin for the remaining liquid.
3. A valve can be found immediately behind it. It is necessary to carefully examine and smell it - if you feel burning, the contacts are burnt out and need to be replaced.
4. You can also apply a standard voltage of 220 V to the coils and check whether the membrane closes. If it remains in the open position, error E4 appears in the Kaiser dishwasher.
5. If the mechanism or electronics fail, the valve definitely needs to be replaced. The wires are disconnected from it and the bolt is unscrewed.
6. They purchase exactly the same part and put it in place. After this, all elements are assembled in reverse order.

When a dishwasher shows an E4 error, it does not necessarily indicate a serious problem. You may just need to reboot your device by unplugging it for a few minutes. In some cases, it is necessary to replace the pressure switch or water supply valve. If everything is done correctly, error e4 will no longer appear in the Hans dishwasher.