The situation when, after completing a work cycle, liquid remains inside the equipment can unsettle any housewife. You open the door dishwasher, expecting to see dry glasses, but instead you find a puddle at the bottom. This is a common problem that often occurs suddenly and requires immediate attention to avoid unpleasant odors or bacterial growth.
Don’t immediately panic and look for the service center number. In most cases filter clogged or a kink in the drain hose are trivial reasons that can be easily eliminated on your own in a matter of minutes. Understanding the structure of the drain system will help you quickly localize the problem and return the unit to operation without extra costs.
In this article we will analyze in detail all the possible reasons why water in the dishwasher does not go away completely, and we will draw up a step-by-step action plan. We will look at both simple mechanical obstacles and more complex technical faults that require replacement parts.
Primary diagnostics and work safety
Before taking active steps to eliminate water, it is necessary to ensure that the process is completely safe. Any manipulations with electrical appliances related to water require preliminary power outages. Unplug the plug from the socket or turn off the circuit breaker at the panel to eliminate the risk of electric shock.
The first step is a visual inspection. Open the door and check the fluid level. If there is little water (a couple of centimeters at the bottom), this may be an acceptable residue in some models, but more often than not it is a sign of a problem. Try running the mode Drain or Rinseto see if the pump is working at all.
If the machine hums, but the water stays still, it means that the pump is trying to work, but something is preventing it. If there is silence, the pump motor may have burned out or there has been a failure in the electronic control module. It's important to listen to the sounds your dishwasher at the moment of attempting to drain.
⚠️ Warning: Never try to bail water out of a running machine or put your hands into the drain hole without making sure the power is turned off. Residual voltage can be dangerous.
☑️ Initial security check
Clogged filter system
The most common reason why the water doesn't go away from the camera, is hidden in a banal blockage. The coarse filter, located at the bottom of the sink, takes the brunt of food debris, bones and fat. Over time, this plaque thickens and turns into an impenetrable crust that blocks the flow of fluid.
To clean, you need to remove the filter cup. It is usually fixed with a rotating mechanism. Rotate counterclockwise until the latches release. Gently pull the structure up. You may find not only food debris there, but also small objects, such as toothpicks or glass shards, that may have gotten inside.
Wash all parts under hot water using a soft brush and degreaser. Grease is the main enemy of the drain system, as it hardens in cold pipes and narrows their permeability. Do not use abrasive sponges to avoid damaging the fine mesh.
To effectively remove old grease, soak the filter in a solution of hot water with the addition of citric acid or a special dishwashing detergent for 30 minutes.
After cleaning, reassemble the structure in reverse order. Make sure the filter fits tightly and clicks. A filter that is not tightly closed can allow large debris to pass further into the system, which will lead to more serious breakdowns. drain pump.
Problems with the drain hose and siphon
If the filter is clean and water is still standing, the problem may be hidden outside the machine body. The drain hose is the line through which dirty water leaves the device. Any obstacle on this path will lead to the liquid will remain in the tank.
Check the hose for kinks. Often dishwashers are moved too close to the wall and the hose becomes compressed, cutting off the water flow. Also inspect the location of the sewer connection. If the hose is connected directly to the pipe, a grease blockage may have formed at the joint.
Pay special attention to the sink siphon if the machine drain is cut into it. If the main sink drain is clogged, water will physically not be able to leave the dishwasher, since the water level in the siphon will block the outlet. Try unclogging your sink drain with a plunger or chemical cleaner.
| System element | Possible problem | Symptom | Solution method |
|---|---|---|---|
| Filter glass | Plaque of fat and food | Water drains slowly or stands still | Hot water rinsing |
| Drain hose | Kink or blockage | Complete absence of drainage | Straightening or blowing |
| Sink siphon | General sewer blockage | Water does not drain either in the sink or in the PMM | Cleaning with a plumbing cable |
| Check valve | Mechanism jamming | Throwing water back from the sewer | Valve replacement |
Malfunction of the drain pump (pump)
The drain pump is the “heart” of the drainage system. It is this that creates the pressure that pushes water out of the chamber. If the previous steps did not help and you hear that the pump is humming, but does not download, or is completely silent, the problem is most likely there.
It often happens that a small object gets into the pump impeller: a lemon seed, a toothpick or even a coin. In this case, the engine hums, trying to turn the shaft, but the jammed impeller prevents it from doing so. Prolonged operation in this mode can lead to burnout of the motor winding.
To check, you need to get to the pump. In different models dishwashers (Bosch, Electrolux, Indesit) access is achieved in different ways: sometimes you need to remove the bottom panel, sometimes you need to turn the car over. Find the pump, it is usually located next to the filter.
⚠️ Attention: Before removing the pump, be sure to replace the container, as the remaining water that could not be scooped out earlier will be drained from the system.
Check the impeller with your finger (with the power off!). It should rotate freely. If there is any jamming, remove the foreign object. If the impeller is intact and rotates, but the pump does not work when turned on, you will need pump replacement to a new one.
How to check the pump winding with a multimeter?
To check, remove the pump and connect the multimeter probes in resistance (Ohms) measurement mode to the motor contacts. Normal resistance is between 150 and 300 ohms. If the device shows infinity or zero, the winding is burned out or shorted, the part needs to be replaced.
Failures in electronics and sensors
Modern dishwashers are crammed with electronics that control all processes. If water does not drain, although the pump is working, the culprit may be the water level sensor (aqua sensor) or pressure switch. These elements tell the control module how much water is in the tank.
If the sensor “lies” and shows that there is no water (or, conversely, there is too much water), the control module will not give the command to turn on the drain pump. Failures in the electronic module itself are also possible, especially if there was high humidity or power surges in the room.
Try resetting the errors. For many models there is a combination of buttons to reset. For example, hold down the button Start for 3-5 seconds or use a special program switching sequence. Exact combination for your model brand can be found in the instructions.
If the problem persists after resetting the errors and checking all mechanical parts, the electronic control module may be faulty and will require professional diagnosis.
Rare causes and design features
Sometimes the reason lies in improper installation. If the drain hose is connected to the sewer too low, without creating the necessary loop (air gap), a siphon effect may occur. In this case, water from the sewer will be constantly drawn back into the machine or, conversely, will not flow away by gravity at the initial stage.
Another rare but possible reason is damage to the corrugation inside the tank or pipes. Cracks can cause water to go under the car rather than down the drain, creating the illusion that it is sitting at the bottom. Carefully inspect the internal cavities for leaks.
It is also worth considering that some models have a structural residual water in the recesses of the bottom. This is not a malfunction as long as the water level does not rise above the bottom of the baskets. However, if water appears again after a long period of inactivity, this may indicate backflow from the sewer due to lack of anti-siphon valve.
Frequently asked questions (FAQ)
Why does the water in the dishwasher smell like sewer?
An unpleasant odor most often indicates stagnant water and bacterial growth in the filter or drain hose. Another reason could be that the water seal in the sink siphon has dried out, causing odors from the sewer to penetrate into the machine. The system must be thoroughly disinfected.
Is it possible to run the dishwasher if there is still water in it?
Running a full wash cycle is not recommended as this may cause overflow and leakage onto the floor. It is better to first eliminate the cause of standing water. However, the “Drain” or “Rinse” modes can and should be started for diagnostics.
How to remove water from the dishwasher manually if the pump does not work?
Use a glass or small mug to scoop the bulk of the water into the bucket. It is convenient to collect the remaining liquid with a dishwashing sponge or rag. Don’t forget to thoroughly wipe the bottom dry afterwards.
What should I do if my Bosch dishwasher does not drain water and the indicator light is blinking?
A flashing light (often a "faucet" or "drip") indicates a specific error. A decoding of the error code for your model can be found in the instructions or on the Internet by searching for “Error E[code] Bosch”. Most often this indicates a clog or problem with the sensor.