Error code E3 in a Krona dishwasher

Krona dishwashers are quite common in homes, and their popularity has even increased slightly recently. This likely explains people's interest in troubleshooting these appliances. Just recently, our specialists received a question about the E3 error code in a Krona dishwasher. Apparently, it's time to start providing code deciphering for these "home helpers."

Various reasons

Why do experts say the causes of the E3 error code are varied? Because this code can indicate completely different problems. The main causes of the E3 error are considered to be:

• clogged fine filter;
• faulty heating element;
• broken thermistor;
• faulty power wiring to the thermistor and heating element;
• the firmware of the control board has been knocked down.

In rarer cases, the E3 code is generated by a burnt-out control module bus.

In the vast majority of cases, special attention should be paid to the fine filter, but if it's not the issue, anything could happen. This E3 error is very broad; it doesn't so much help the technician find and fix the problem as it throws them off the trail.

Clogged fine filter

If the E3 error appears on your Krona dishwasher's display, don't immediately start disassembling the appliance; it might still work out. Try turning off the power to the dishwasher completely for 20 minutes and then turning it on again. If the error reoccurs, it might be time for repairs, but first, let's clean the filter. It might seem like a trash filter has nothing to do with uneven water heating in the system. In fact, these two problems are directly related.

Imagine a situation where water dripping from dishes remains in the wash chamber of a Krona dishwasher and doesn't return to the system, or at least drains slowly. The heating element continues to operate at the same intensity, heating the remaining water more intensely than usual, as the program is designed for a specific volume of water. The thermistor sends a signal to the control module indicating an incorrect water temperature, which then disables the dishwasher and displays an E3 error. Resume normal water circulation in the system, and the error will disappear.

1. We free up space in the dishwasher washing chamber by removing the lower basket.
2. We disconnect the lower spray arm, as it will interfere with cleaning the filter.
3. We take out the coarse filter together with the mesh and put it aside.
4. We put our hand into the filter bowl and take out another filter, which is designed for fine water purification.

Often, the fine filter becomes coated with a layer of grease. This forms a waterproof film, which causes clogging.

5. All filters must be washed and degreased, and then returned to their place.

Heating element or thermistor?

It's good if the problem is a clogged filter, but what if it's not? What should you do in that case? You'll need to check the heating element, thermistor, and the power supply wiring to these components; they're likely the problem. When preparing for repairs, you should disconnect and disassemble the dishwasherIn this case, complete disassembly isn't necessary, but the right side panel must be removed to access the heating element and thermistor. Once removed, you'll see the heating element right in front of you.

1. First, remove the power wires.
2. Now we reconfigure the multimeter to ohmmeter mode and check the resistance of the heating element.
3. If we detect a fault, we change the heating element; if no fault is detected, we continue checking.
4. We remove the power wire from the thermistor and check its resistance.
5. Lastly, we check the power supply wiring.

If the fault still cannot be identified, contact a qualified technician. They will check the electronic board along with the above-mentioned components and render a verdict. It's possible that the error is actually caused by electronics, but in this case, you won't be able to save money on a specialist's services.

So, how do you fix the sudden E3 error in your Krona dishwasher? First, check the dust filter, and then the other parts on our list. You'll soon find the cause, but if you can't, call a technician—it's likely a serious issue.

   

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