Siemens dishwasher does not drain water

There is water left in the dishwasher Modern technology is constantly becoming smarter and more reliable thanks to the hard work of engineers, but even this cannot completely eliminate breakdowns. Thus, the situation when a Siemens dishwasher does not drain water regularly occurs for many housewives, as it is considered one of the most common for dishwashers. But if this happens, don’t be upset, because perhaps nothing is even broken in the “home assistant”, so you can fix the problem yourself. Let's look at the most common causes of this frequent malfunction.

What problem are we dealing with?

First you need to understand why the machine refuses to drain water and freezes. The list of possible causes is long, but each problem can be easily checked by devoting a little time to it. Most often the problem occurs due to the following:

blockage This is the number one option that should be checked when the equipment refuses to remove the waste fluid. Perhaps the hose is simply clogged and requires cleaning;
drain pump. If the pump is damaged, it will be impossible to pump water into the sewer;
pressure switch If the water level sensor fails, the dishwasher control board will not be able to understand how much water is in the washing chamber and how much needs to be added or drained. Therefore, in this case, the equipment will simply freeze.

You can also highlight damage to the control module, which transmits commands to all other elements in the dishwasher, but if the problem is there, then it is better to leave the repair to specialists.

Unlike the PMM electronic board, which cannot be repaired without professional skills and extensive experience, you can deal with the three problems listed above with your own hands, even without special knowledge.

“Insides” are clogged with dirt

If you suspect a blockage, you should first listen to what sounds the equipment makes during operation. If you hear a proper hum from the pump, you should check the drain hose for debris, deposits and other dirt. Also, be sure to make sure that the hose is not pinched, that there are no heavy objects lying on it, and also look into the siphon under the sink to see if it is clogged. If everything is in order, and even the water flows into the sink drain without any serious delays, then you can proceed to diagnosing the main filter located at the bottom of the dishwasher chamber. What should you do for this?

Remove the washing chamber from the dish baskets, which will interfere with the main filter.
Remove the lower sprinkler.
We take out the filter, and then thoroughly clean it with hot water and detergent.
Now we take out a coarse metal mesh, and then rinse it like a filter.
Only after making sure that all mesh holes are clean and free of debris, dirt or deposits can the part be installed back in place.

After installing all the elements in place, run a test cycle of the machine to make sure that the used water begins to drain. However, if the problem is not solved, then you will have to move on to checking the drain pump. This is not so easy to do, because you can’t get to the pump through the side hole, which means you have to put the car on the back wall. Be sure to drain the water before putting the machine on the floor - tilt the body of the device to the right, first placing a basin for liquid under the equipment.

Pay attention to the drain pump

Trouble does not come alone, so the drain pump can break in two different ways. In the event of an electrical breakdown, the part can only be checked using a multimeter set to Ohmmeter mode to measure resistance. If the drain pump burns out, then you don’t even have to try to repair it and waste time; you can only buy a new one and replace it. Zanussi dishwasher pump

However, if the reason is hidden in the mechanics, then you can easily fix it yourself. For example, if the impeller has fallen off the pump, then you can simply put it back in place, and in a situation where the rotor begins to rotate poorly, it will be enough to lubricate it well. Thus, most mechanical problems can be detected with the naked eye and repaired without any specific tools.

Sensor that detects water level

Finally, if the pump and blockages have nothing to do with it, then all that remains is to check the pressure switch. It's located close to the pump you checked in the last step, so it won't take long. Remove the water level sensor, clean its small tube, which often gets clogged, and then measure the resistance with a multimeter and check the condition of the part's wiring.

In case of damage, the element simply needs to be replaced with a new one, but what to do if the reason for the machine’s refusal to drain water has not been found? If this happens, then there is a high probability that the problem is in the PMM control module, which you will no longer be able to cope with on your own.But this is not a reason for frustration, because you have already done everything possible for your “home assistant,” so feel free to call a professional.