Error code E4 in Krona dishwasher

error E4 V PMM Krona If error E4 appears in the Krona dishwasher, you must urgently turn off the power to the “home assistant” and start looking for a decoding of this code. Some error codes indicate serious malfunctions, and if immediate action is not taken, it will be much more difficult to repair the machine later. Today we will analyze the E4 code. As usual, we will give a breakdown of the code and see how to find and fix the problems that cause it.

Breakdowns

Often error E4 is associated with the fact that a small puddle forms under the Crohn dishwasher. If the control module had not reacted to the problem in time and activated error E4, stopping the operation of the unit, the puddle would have turned into a huge puddle. And the neighbors below (if there are any) wouldn’t say thank you either.

This error tells the user that water has overflowed and entered the dishwasher tray. There is a sensor in the pan that protects against leaks, so it worked, preventing the flood. Sometimes an error appears when such a sensor triggers falsely, but such cases are more rare. So we check:

a sensor that protects the machine from leakage, and at the same time the presence of water in the pan;
an intake valve that may simply stop closing normally;
a pressure switch, which may completely burn out, or may simply become clogged with dirt.

The pressure switch tube becomes clogged with dirt and prevents the device from working properly, which causes many problems.

By checking all these elements one by one, we will be able to detect the malfunction and make repairs ourselves. The best place to start is with a leak sensor.

Leak-proof sensor

To get to the leakage sensor, and to many other parts hidden in the depths of the dishwasher tray, Krona is best to immediately remove both side walls. We do this immediately, not forgetting to disconnect the “home assistant” from communications.

First of all, we put our hand into the pan and feel. If there is a lot of water there, then there really is a leak somewhere and we need to find it, but first let’s drain the water.

Place a rag on the right side of the machine body, and then tilt the dishwasher to drain the water.
We put a clean rag directly into the pan and carefully collect the remaining water that could not be drained.
Let's lower the sensor float down, deactivating it.

What to do next? And then you need to look for the place of the water leak. We inspect everything: detail by detail, pipe by pipe, until we find a hole. Further on the situation. It is better to replace the broken part, but some people make do with waterproof sealant. By getting rid of the leak, you will get rid of error E4.

If there is no water in the pan or there is very little water, just a few drops, it is worth checking the leakage sensor itself. Particular attention should be paid to contacts that may close spontaneously due to oxidation. Clean the contact thoroughly, or better yet, replace the entire sensor, it will be more accurate.

Intake valve malfunction

Quite often, the E4 fault code appears due to a faulty intake valve. You can verify this even before disassembling the Krohn machine. You need to listen to what is happening inside between the launch of the program and the appearance of error E4. If the valve in the car constantly hisses, drawing in water, and the pump hums, pumping it out, it means that for some reason the fill valve does not close.

If the pump did not pump water out of the system, it could overflow into the pan, which would result in additional problems.

If you hear something like this, immediately turn off the water supply to the machine, turn it off and start checking the inlet valve. Mainly, you need to check the mechanism for opening and closing the valve; perhaps debris has simply gotten in there, causing the part to behave this way. You also need to check the resistance of the valve coil; if a breakdown is detected, fix it by replacing the valve.

Pressostat errors

If the inlet valve works without any problems, and water still does not flow correctly into the Krona dishwasher, you should pay attention to the pressure switch. The water level sensor is one of the most capricious elements of a dishwasher. This is a fairly sensitive device with a special tube on which a hose is attached. Through this thin hose, debris can get into the tube, which completely paralyzes the operation of the dishwasher. Some insignificant grain of sand may well stop the operation of a household appliance, and until you remove it from there, the control module will record error E4.

First of all, you need to remove and carefully check the pressure switch. Particular attention should be paid to the tube. If it is clean, you should check the device coil. If you find a problem, carry out Replacing the pressure switch in a dishwasher Crown. There should be no problems with this, the main thing is to buy an original part as a replacement.

So, how to fix it, and most importantly, how to find the breakdown that caused the E4 error to appear in your Krona dishwasher? It is necessary to systematically examine all suspicious parts according to the list that we provided in the article until the malfunction is discovered.Then the defective part just needs to be replaced, there is no need to invent anything. Well, we say goodbye to you and wish you good luck!