What to do if the Crohn dishwasher shows an E4 error? You need to find the decryption of the icons and try to fix the problem. This error is due to the fact that the hopper is full of water.
The dishwasher is equipped with a board that controls the operation of all components and parts. It is equipped with a self-diagnosis system and detects malfunctions. Then the module displays an error code on the display - a brief description is in the instructions, and read more in our article.
Why is the error code E4 lit on the board
For what reasons can PMA Krona display error E4 on the display? You will see it if there is too much water in the chamber. This is dangerous because it can lead to leakage.
How does the water set in the dishwasher work. The inlet valve receives a signal from the board, its membrane opens, and water begins to flow into the system. The level sensor (pressure switch) determines its amount in the tank, sending a signal to the module about the completion of the fence.
It turns out that the cause of this problem could be:
- Pressostat malfunction.
- Damage to the filler valve.
How to fix the problem
Before repairing the problem, eliminate the system failure. To reset the screen, do this:
- unplug the PMM plug from the outlet;
- after 10-15 minutes, reconnect.
If this does not help, inspect the details.
Check intake valve. It is usually located at the bottom of the case:
- close the shutoff valve;
- disconnect the inlet hose - be careful, water may spill from it;
- there is a valve behind it - see if its contacts are burnt;
- check the mechanical part by applying a working voltage of 220 V to the part coils. Does the membrane open and close? So the item is working.
In the event of a breakdown, the membrane sticks in the open position, so the water is supplied without stopping.
In the event of a malfunction, a complete valve replacement will help. To do this, disconnect the wiring chips and unscrew the mounting bolt. With the old element, you can go to the store to find the right replacement. Installation is carried out in reverse order.
To diagnose the pressure switch, you have to disassemble the machine. In the "Bosch", "Siemens" models, it is connected to the circulation pump. Therefore, the approach to the part is carried out through the bottom of the equipment.
How to replace the level sensor, we wrote in a separate publication. The verification is simple: inspect the wiring. In the event of a malfunction, the sensor must be replaced.
Do not be alarmed by noticing error E 4 on the screen of a Krona dishwasher. Now you have the meaning and decryption of the code - you can fix the problem with your own hands.