Error code E4 in a Krona dishwasher

If you receive the E4 error code in your Krona dishwasher, you should immediately unplug your appliance and begin troubleshooting the code. Some error codes indicate serious malfunctions, and if you don't take immediate action, repairing the machine will be much more difficult. Today, we'll examine the E4 error code. As usual, we'll provide the code's meaning and show you how to identify and fix the problems that cause it.

Breakdowns

Error E4 is often associated with a small puddle forming under the Krona dishwasher. If the control module hadn't reacted to the problem in time and triggered the E4 error, stopping the machine, the puddle would have turned into a huge mess. And the neighbors downstairs (if there are any) wouldn't have been so happy either.

This error alerts the user to water overflowing and entering the dishwasher tray. The tray contains a leakage sensor, which is what triggered it, preventing the flood. Sometimes the error appears when such a sensor triggers falsely, but such cases are rarer. So we check:

• a sensor that protects the machine from leaks, and at the same time detects the presence of water in the tray;
• an inlet valve that can simply stop closing properly;
• pressure switch, which may burn out completely, or may simply become clogged with dirt.

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

By checking each of these components one by one, we can identify the problem and make repairs ourselves. The best place to start is with the leak detector.

Leakage protection sensor

To access the leak sensor, as well as many other components hidden deep within the dishwasher's tray, it's best to remove both side panels. Do this immediately, remembering to disconnect your dishwasher from the power lines.

First, stick your hand into the pan and feel it. If it's full of water, there really is a leak somewhere and we need to find it, but first, drain the water.

1. Place a cloth on the right side of the machine, then tilt the dishwasher to allow the water to drain.
2. Place a clean cloth directly into the tray and carefully collect any remaining water that could not be drained.
3. Let's lower the sensor float down, deactivating it.

What to do next? Next, we need to find the leak. We inspect everything: part by part, pipe by pipe, until we find the hole. Then, it depends on the situation. It's best to replace the punctured part, but some people get by with a waterproof sealant. Fixing the leak will also clear up the E4 error.

If there's no water in the pan, or only a few drops, it's worth checking the leak sensor itself. Pay particular attention to the contact, which can spontaneously short due to oxidation. Thoroughly clean the contact, or better yet, replace the entire sensor—that's more reliable.

Intake valve malfunction

Quite often, the E4 error code is caused by a faulty inlet valve. This can be confirmed even before disassembling the Krona machine. Listen to what's going on inside between the start of the program and the appearance of the E4 error. If the valve constantly hisses as it fills with water, and the pump hums as it pumps out, it means the inlet valve isn't closing for some reason.

If the pump did not pump water out of the system, it could spill into the pan, which would lead to additional problems.

If you hear this, immediately shut off the water supply to the machine, disconnect it from the power, and check the inlet valve. Specifically, you need to check the valve's opening and closing mechanism; debris may have gotten in, causing this behavior. You also need to check the resistance of the valve coil; if a fault is detected, fix it by replacing the valve.

Pressure switch errors

If the inlet valve is working properly, but water is still not being supplied to the Krona dishwasher correctly, it's worth checking the pressure switch. The water level sensor is one of the most sensitive components of the dishwasher. It's a fairly sensitive device with a special tube attached to a hose. Debris can get into the tube through this thin hose, completely paralyzing the dishwasher. Even a tiny grain of sand can completely stop the appliance from working, and until it's removed, the control module will record an E4 error.

First, remove and thoroughly inspect the pressure switch. Pay particular attention to the tube. If it's clean, check the device's coil. If a problem is detected, repair it.replacing the pressure switch in a dishwasher Crown. This shouldn't be a problem; just buy the original replacement part.

So, how do you fix, and more importantly, how do you find the problem that caused the E4 error in your Krona dishwasher? You need to systematically inspect all suspicious parts using the list we provided in the article until the fault is detected. Then, simply replace the defective part; no need to invent anything. So, we bid you farewell and wish you good luck!

   

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