Siemens dishwasher does not drain water

PMM does not drain water Experts consider the situation when a Siemens dishwasher does not drain water to be quite standard. This behavior of the “German” is not necessarily caused by some kind of breakdown; on the contrary, most often such a problem arises for the most trivial reasons. One way or another, if something like this happens, you need to figure it out and, first of all, you need to identify a range of possible reasons. Let's start with this.

Why does this happen?

So, what to do if the dishwasher never wants to remove waste water and for this reason freezes? It is necessary to identify the range of possible problems and malfunctions that cause this. This is not difficult to do, but we will still help you.

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

The breakdown of the control module 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 this.

Problems with clogs

First you need to check and eliminate the most common reasons why draining 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 under the sink is clogged. Make sure that the water drains out of the sink without delay. Next, you need to check whether the main filter at the bottom of the washing chamber is clogged.

Let's free the washing chamber from extra baskets that will interfere with getting to the filter.
Move or remove the lower sprinkler.
We take out the glass-like filter and wash it with hot water and detergent.
We take out the coarse metal mesh with our own hands and wash it too.

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

cleaning the filter After putting the filters in place, you should 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. It will not be possible to reach the pump through the side wall of the case; you will have to remove the pan by placing the machine on the back wall, but first you need to do an important thing, remove the water. How to drain water from a dishwasher? You need to tilt the body of the machine to the right, and substitute 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. Once you get to the pump, you need to disassemble and clean it. Usually there is a lot of dirt on it, but this dirt does not always make it difficult for the pump to work. Next you need to check this detail more carefully.

The pump is broken

There are two categories of breakdowns that can be typical for the 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 must be replaced, but you can try to eliminate mechanical failures.

For example, if the impeller of a pump has come off, then it can be “set” in place; if the rotor does not rotate well, it needs to be lubricated. In general, the point is that the nature of the mechanical failure is determined visually during the inspection of the part and nothing else. If during the inspection you realize that the breakdown cannot be repaired, buy a new pump and don’t fool yourself.

Pressostat

If the drain pump turns out to be in order, you need to remove and check the pressure switch of the Siemens dishwasher. Since we have already removed the pan and checked the pump, we can get to the pressure switch, which is located nearby, without any problems. After removing the part, clean its tube, as it clogs very often, creating obstacles to normal operation. Then do the following:

take your multimeter and set it to test resistance;
ring detail;
check the wiring supplying the pressure switch.

If the problem has not been identified on your own, you should contact a specialist. Maybe you did something wrong, or maybe the problem is really in the electronic module, and not in the parts that we just checked. In any case, you tried to solve the problem yourself, and that deserves respect.

So, by checking the possible reasons for the breakdown of the Siemens dishwasher, namely: blockages, pump and pressure switch, you will probably be able to fix your “home assistant”.If you fail, then the matter is really serious, you need to use the “heavy artillery” and call a qualified technician. But we think that you can handle it yourself, the main thing is desire and patience. Good luck!