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Siemens dishwasher does not drain

PMM does not drain waterThe situation when the Siemens dishwasher does not drain the water seems to be fairly standard for specialists. This behavior of the "German" is not necessarily caused by some kind of breakdown, on the contrary, most often this problem arises for the most common reasons. One way or another, if this happened, you need to understand and, first of all, you need to identify a circle of possible causes. This is where we start.

Why is this happening?

So what to do if the dishwasher does not want to remove the waste water and freezes for this reason? It is necessary to identify the circle of possible problems and malfunctions that cause this. This is not difficult to do, but still we will help you.

  1. First, blockages may be to blame. They most often bother dishwasher owners, mainly through their fault.
  2. Secondly, the pump may fail. Since the drain pump is responsible for pumping water into the sewer, its breakdown makes this process impossible.
  3. Thirdly, the pressure switch may break. If this sensor fails, the control module cannot find out how much water is in the dishwasher. This causes the drain to stop and hang.
  4. And, finally, fourthly, the control module may fail, which in turn will lead to any errors, including the inability to drain the water.

The control module breakdown is the most serious and only a specialist can deal with it, but you can fix the other three troubles yourself. Let's try to do it.

Clogging problems

First you need to check and exclude the most common reasons why drainage is impossible. Listen to how the dishwasher works. If you hear the pump humming, then you need to inspect the drain hose and make sure that it is not clogged or pinched. You also need to see if the siphon that stands under the sink is clogged. Make sure that water flows into the sink without delay. Next, you need to check whether the main filter at the bottom of the washing chamber is clogged.

  1. We will free the washing chamber from unnecessary baskets that will prevent you from reaching the filter.
  2. Move or remove the lower sprinkler.
  3. We take out the glass-like filter and rinse it with hot water and detergent.
  4. With our own hands, we pull out the coarse metal mesh and also wash it.

You need to make sure that all the holes of the mesh are washed, especially make sure that the mesh is not covered with greasy plaque.

filter cleaningOnce the filters are in place, you must test run the dishwasher. If the waste water still does not want to be removed from the Siemens dishwasher, it is worth checking the pump. You won’t be able to get to the pump through the side wall of the casing, you will have to remove the pan by putting the machine on the back wall, but first you need to do an important job, remove the water. How to drain the water from the dishwasher? It is necessary to tilt the car body to the right, and substituting the basin, wait until the water drains.

If you are having difficulty with disassembling the dishwasher, then read the publication of the same name posted on our website. There you will find many interesting details and instructions for disassembling the dishwasher. When you get to the pump, you need to disassemble and clean it. Usually there is a lot of dirt on it, but far from always this dirt complicates the operation of the pump. Next, you need to check this item more carefully.

The pump brokeSiemens pump

There are two categories of breakdowns that may be characteristic of a drain pump: mechanical and electrical. Electrical failure can be detected by checking the part with a multimeter. If the pump burns out, it is useless to repair it, it is necessary to change it, but mechanical breakdowns can be eliminated.

For example, if the impeller has jumped off the pump, then it can be “put” in place, if the rotor does not rotate well, it must be lubricated.In general, the bottom line is that the nature of the mechanical breakdown is determined visually during the inspection of the part and nothing else. If during the inspection you realized that the breakdown could not be fixed, buy a new pump and do not fool yourself.

Pressure switch

If the drain pump is in order, you need to remove and check the pressure switch of the Siemens dishwasher. Once we have removed the sump and checked the pump, then we will get to the pressure switch, which is nearby, without any problems. After removing the part, clean its tube, because it clogs very often, creating obstacles to normal operation. Then do the following:

  • take your multimeter and set it to test the resistance;
  • ring the item;
  • Check the wiring for the pressure switch.

In the event that the problem itself has not been identified, you must contact a specialist. Maybe you did something wrong, or maybe the matter is really in the electronic module, and not in the details that we just checked. In any case, you tried to solve the problem yourself, and it deserves respect.

So, having checked the possible causes of the Siemens dishwasher’s failure, namely blockages, a pump and a pressure switch, you can probably fix your “home assistant”. If you do not succeed, then the matter is really serious, you need to use "heavy artillery" and call a qualified craftsman. But we think that you can do it yourself, the main desire and patience. Good luck


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