Error E2 on a Kuppersberg dishwasher

Despite the huge number of possible problems, dishwasher users most often encounter the same set of fault codes. For example, error E2, which appears most often when using a “home assistant” from the Kuppersberg brand. It informs the user about obvious limitations in the water level in the system, which can occur both due to blockages and damage to key components of the machine. We will study in detail the problem and its solution at home.

Cleaning the main filter system

Eliminating an error code is always easier if you start with the most basic causes of the malfunction. This way you can quickly find a breakdown without wasting time disassembling equipment and studying hard-to-reach parts. Therefore, you first need to check the cleaning filter, which is located at the bottom of the hopper of the Kuppersberg dishwasher. The unit is located near the rocker for spraying liquid - its cover is located directly under the lower basket for dishes.

Remove all baskets from the washing chamber first to make your work easier.

The garbage filter very often becomes clogged with food debris and foreign objects that may have remained on dirty dishes before they were loaded into the dishwasher. Therefore, the filter element must be cleaned at least once a week, which will avoid the formation of mold and unpleasant odors in the chamber. Plus, it is the clogging of the cleaning filter that often prevents water from going down the drain after washing. What should I do to clean the filter element?

• Disconnect equipment from all communications.
• Open the door.
• Remove all water from the wash chamber.
• Use a rag or sponge to remove any debris that may have collected around the debris filter.
• Remove the dust filter cover.
• Wash all parts of the filter element with a stiff brush, or with a citric acid solution if the dirt cannot be removed.
• Wait until the filter dries, but do not rush to put it back in its place, because first you need to clean the drain hole with the mesh filter.
• Remove all debris and dirt from the surface of the drain.
• Remove the parts from the drain and temporarily seal the hole with tape to prevent foreign objects from entering it.
• Clean the components with a sponge or brush.

Handle the part carefully so as not to stretch or deform the rubber seal.

If you cannot remove the dirt yourself, then in this case you can use a solution of citric acid, or take a solution of table vinegar.

Drain hose clogged

An unpleasant error E2 in a Kuppersberg dishwasher can also occur due to the drain hose. If you are lucky, you can simply straighten the hose so that the plug inside moves and goes into the drain, but this rarely happens, so you will have to dismantle the hose and wash it. What to do to make this happen?

• Disconnect the “home assistant” from all communications.
• Loosen the clamp to remove the hose from the sink fitting or tee tap.
• Move the dishwasher to the center of the room to allow easy access to all sides of the cabinet.
• Place rags or unnecessary towels under the machine, and then lay the device on its side.
• Disconnect the filling hose from the Kuppersberg PMM, having first loosened the clamp.
• Rinse the hose thoroughly with a powerful stream of running water, or soak the hose in a bowl of citric acid solution if the plug does not budge.

After the manipulations have been done, all that remains is to check whether the error code has “gone away”. To do this, you need to start an idle working cycle without dishes and carefully monitor the operation of the device. If it was not possible to reset error E2, then move on to the next check point.

Testing and changing the water level sensor

When the cause of the malfunction is not a clogged filter or a plug in the hose, you will have to partially disassemble the Kuppersberg dishwasher to check the water level sensor. If the machine is still under warranty, then it is better to entrust it to a service center that will carry out repairs free of charge. If the warranty has expired, then we proceed to partial disassembly.

• Disconnect the machine from the power supply and water supply.
• Open the washing chamber door.
• Remove all baskets from the hopper.
• Take out the garbage filter, and then use a sponge or rag to remove the liquid from its seat.
• Place the machine on its back.
• Remove the fasteners from the pallet, and then remove the bottom of the PMM itself.
• Disconnect all wires from the float switch, and then remove the bolt that holds the part in place.
• Find a water level sensor that looks like a plastic box with a tube connected to it.
• Disconnect the pipe from the sensor using pliers.

Partial disassembly of the Kuppersberg dishwasher has been completed, all that remains is diagnostics of the pressure switch. You should start with the mechanics, for which you need to blow into the fitting of the part and listen to the sounds. If you hear clear clicks, then the sensor switch and itself are fine.

It’s even easier to check electronics - this should be done with a regular multimeter.Switch the tester to ohmmeter mode, connect its probes to the contacts of the water level sensor and study the data obtained. If the indicators tend to zero, then the pressure switch does not need to be replaced.

Additionally, you need to examine the pressure sampling tube, which may be clogged. If this is the case, then simply cleaning the tube is enough. If you discover a malfunction at any stage of checking the element, then it needs to be replaced with a new part, since there is no point in repairing the unit.

After purchasing a new pressure switch that suits your “home assistant” from Kuppersberg, the part must be installed according to our instructions in the reverse order. Be sure to check the operation of the machine after replacing the part to understand that the E2 error has gone away.

Bad drain is to blame

Finally, the cause of a Kuppersberg dishwasher problem may be a broken drain pump. After each operating cycle, this unit pumps the waste liquid directly into the drain. If the part fails, for example, burns out or becomes clogged, then water from the washing chamber will not be able to get into the sewer.

To diagnose the pump, you will have to remove it from the housing according to similar instructions given above. The only difference is that repair specialists advise removing not the pan of the device, but the side wall, because this way it is easier to get to the drain pump.

When you have free access to the pump, disconnect all wires and pipes from it, and then remove it. It is necessary to check the movement of the impeller, the blades of which should rotate without difficulty. Carefully examine the impeller, because it sometimes becomes clogged with various debris, for example, fragments of broken dishes, which must be carefully removed to eliminate the E2 error.

Before each disconnection of wires, be sure to take photographs of the correct wiring connection so that you have a reference at hand later.

If the blades of the assembly are not blocked or broken, then you need to check the pump itself. To do this, we again need a multimeter switched to resistance measurement mode. The normal pump resistance is about 200 Ohms, so if the tester data differs from the norm, you will have to buy a new pump.

Take a failed item to the store as an example, so as not to make a mistake with your choice and buy an original part for your Kuppersberg dishwasher. Installation follows our instructions in reverse order. Do not forget to check the functionality of the “home assistant” after replacement.

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