Siemens dishwasher error code E22

Siemens dishwasher error code E22 Despite the complex design of modern household appliances, most problems can be resolved on your own, even without calling a service center. For example, error E22, which indicates a problem with the drain system, can easily be fixed at home. Let's look at why this error might occur and how to fix it without outside help.

Common reasons why water doesn't drain

First, let's identify all the possible causes of drainage problems in a Siemens dishwasher. These are the most common, most common, and easiest to resolve issues.

The drain hose is kinked. This could be due to a kinked drain hose or accidentally placing a heavy object, such as the dishwasher itself, on it, blocking the water flow. In this case, resetting the E22 error is very simple: simply straighten the hose, remove any unnecessary objects or appliances, and then inspect it for damage. Be sure to test the Siemens dishwasher after performing these steps. This will help determine whether the error code has cleared.
A clogged debris filter. This is usually caused by foreign objects such as food scraps, meat and fruit bones, napkins, tea bags, and even shards of glass. Fixing this is also simple: clean the filter and, as a preventative measure, remember to clean it at least once a month.

The manufacturer recommends not loading dirty dishes with food residue into the washing chamber to prevent foreign objects from clogging the filter element.

The pump or drain hose is clogged. Foreign objects in these components can also cause the E22 error, as debris will clog the parts and prevent the waste fluid from draining into the sewer after the cycle.

These three situations are the most common causes of the E22 error in Siemens dishwashers. We'll explore the solutions in detail in the following sections.

The filter hasn't been cleaned for a long time.

If the cause is a clogged drainage filter, you can fix the situation yourself in just half an hour. In this situation, a regular cleaning is required, which should be repeated at least once a month. What to do for this?

First, drain any remaining waste liquid from the bottom of the washing chamber after washing. The easiest way is to place a large container underneath, disconnect the drain hose, and manually activate the drain. This will also help you inspect the drain pipe and drain for any blockages.
Once all the water has drained, you can clean the filter element. First, disconnect your Siemens dishwasher from all power supplies and remove all the baskets from the bin. Then, remove the debris filter from the bottom of the wash chamber, followed by the mesh screen installed underneath it. Remove all debris using a brush and a powerful stream of hot water from the tap.

If stubborn stains are difficult to remove, you can soak the parts in a citric acid solution for at least an hour.

After reassembly, run an empty cycle without dishes to test the washer. If the E22 error code remains on the display, other causes need to be investigated.

The pump is broken or blocked

If the filter element is working properly and has been cleaned, but water still does not drain into the sewer, you need to check the pump and its impeller, which may be blocked by broken glass. To get to this unit you will have to disassemble the equipment. If the warranty on your Siemens "home assistant" has long expired, you can disassemble the machine yourself.

We've already drained the water, but we still need to tilt the dishwasher on its side a little to get rid of any remaining water.
Use a sponge or cloth to wipe the debris filter to remove all moisture.
Place the machine on its back.
Remove the clips holding the bottom of the device.
Carefully disconnect the Aquastop sensor installed on the other side of the tray.
Disconnect the wires connected to the pump, unscrew the clamps and remove the element itself.

Take a few photos of the correct wiring connections - this will help with reassembly.

First, remove the pump cover and carefully inspect the impeller for foreign objects. If there is glass inside that is indeed blocking the part, carefully remove it and check the impeller's rotation. Then, set the multimeter to resistance mode, connect the device's probes to the pump terminals, and check the readings. Normally, the resistance should be around 200 ohms, but if the tester shows significantly different values, the pump should be replaced.

The machine doesn't know the water level.

If none of the above helps to reset the error code, then the only thing left to do is check the water level sensor. The pressure switch in the machine is installed to monitor the pressure in the system and then transmit data to the control module of the Siemens dishwasher. Using this information, the dishwasher's "brain" determines the next steps. If the data is missing or transmitted incorrectly, the natural course of the wash will be disrupted. What can be done to correct the situation?

The water level sensor is located near the pump, so the parts can be tested in pairs. The pressure switch looks like a small round plastic washer with a pressure tube.
Carefully remove the tube with pliers, unscrew the clamps, and then remove the pressure switch.
Like the pump, the sensor needs to be tested with a multimeter set to ohmmeter mode.

If the tester's data indicates a fault, or the element shows visible damage, it needs to be replaced. Take the failed pressure switch to the store as an example, or write down the serial number of your Siemens dishwasher to ensure you choose the right spare part. If the drain doesn't work even with a new sensor, the control board is most likely faulty. Trying to restore it yourself is not worth it, as the risk of damaging it even more is too great. It would be safer to call a service center specialist to check everything and repair it if the part can be repaired.