Siemens dishwasher won't drain water

Experts consider it a fairly common occurrence for a Siemens dishwasher to fail to drain. This behavior isn't necessarily caused by a malfunction; in fact, it's often caused by the most trivial reasons. Regardless, if this happens, it's important to investigate, and first, to identify the possible causes. Let's start with that.

Why does this happen?

So, what should you do if your dishwasher refuses to empty its drains and is stuck? It's important to identify the possible problems and malfunctions that could be causing this. It's not difficult, but we're here to help.

1. Firstly, clogs may be to blame. These are the most common problem for dishwasher owners, primarily due to their own fault.
2. Secondly, the pump may fail. Since the drain pump is responsible for pumping water into the sewer, its failure makes this process impossible.
3. Third, the pressure switch may be faulty. If this sensor fails, the control module cannot determine how much water is in the dishwasher. This causes the drain to stop and the dishwasher to freeze.
4. And finally, fourthly, the control module may fail, which in turn will lead to all sorts of errors, including the inability to drain the water.

Control module failure is the most serious and can only be resolved by a specialist. The other three issues are easily resolved yourself. Let's try them.

Problems with blockages

First, you need to check and rule out the most common causes of a blocked drain. Listen to the dishwasher. If you hear the pump humming, inspect the drain hose to ensure it's not clogged or pinched. You also need to check if the siphon located under the sink is clogged. Make sure water drains smoothly into the sink. Next, check to see if the main filter at the bottom of the sink is clogged.

1. Let's clear the washing chamber of unnecessary baskets that will interfere with access to the filter.
2. Move or remove the lower sprinkler.
3. We take out the glass-shaped filter and wash it with hot water and detergent.
4. We take out the coarse metal mesh with our hands and wash it too.

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

After replacing the filters, you should perform a test run of the dishwasher. If the wastewater still refuses to drain from your Siemens dishwasher, it's worth checking the pump. The pump isn't accessible through the side of the dishwasher; you'll have to remove the tray and lay the machine on its back. But first, there's an important step: draining the water. How do you drain the dishwasher? Tilt the dishwasher to the right, place a basin underneath, and wait for the water to drain.

If you are having difficulty with disassembling the dishwasher, then read the publication of the same name on our website. There you'll find many interesting details and instructions for disassembling the dishwasher. Once you reach the pump, you need to disassemble it and clean it. It's usually covered in a lot of dirt, but this dirt doesn't always impede the pump's operation. Next, you need to inspect this part more thoroughly.

The pump broke down

There are two categories of failures that can affect a drain pump: mechanical and electrical. Electrical failures can be detected by testing the part with a multimeter. If the pump is burned out, repairing it is useless and must be replaced. However, mechanical failures can be repaired.

For example, if a pump's impeller has come loose, it can be reinstalled; if the rotor isn't turning properly, it needs lubrication. Basically, the nature of a mechanical failure is determined visually during inspection of the part, and in no other way. If, during the inspection, you realize the failure can't be fixed, buy a new pump and don't worry about it.

Pressure switch

If the drain pump is working properly, you need to remove and check the Siemens dishwasher's pressure switch. Since we've already removed the drain pan and checked the pump, we can easily access the pressure switch, which is located nearby. After removing the part, clean its tube, as it often gets clogged, preventing normal operation. Next, do the following:

• Take your multimeter and set it to check resistance;
• ring the part;
• Check the wiring supplying the pressure switch.

If you can't identify the problem yourself, you should contact a specialist. Perhaps you did something wrong, or perhaps the problem really is with the electronic module and not the components we just checked. In any case, you tried to solve the problem yourself, and that deserves respect.

So, after checking the possible causes of your Siemens dishwasher's malfunction—namely, clogs, the pump, and the pressure switch—you'll likely be able to repair your "home helper." If you can't, it's a serious matter, and you'll need to call in the "heavy artillery" and a qualified technician. But we think you can handle it yourself, with just a little bit of determination and patience. Good luck!

   

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