The situation when the washing machine stops with full water in the tank always takes you by surprise. Instead of clean laundry, you get a wet mass and a puddle on the floor if you decide to open the hatch ahead of time. This is not just inconvenience, it is a signal that there is a failure in the drainage system that requires immediate intervention.
Reasons why the water doesn't go away from the tank, there can be many: from a banal blockage to the failure of expensive electronics. Often the problem lies in a mechanical obstacle, which is easy to fix yourself without calling a technician. However, ignoring the symptoms can lead to more serious consequences, including engine overheating or leaking.
In this article we will analyze in detail all the possible reasons for stopping the drain. You will learn how to diagnose a malfunction, what tools are needed for repairs, and in which cases it is better not to take risks. Understanding the drain system will help you save time and money on servicing.
Primary diagnosis and check of the drain hose
Before disassembling the equipment, it is necessary to exclude the simplest and most obvious options. Users often forget that the washing machine is connected to a public sewer system, where problems can also arise. If there is water standing in the tank, first check to see if it is kinked. drain hose behind the rear wall of the unit.
A visual inspection of the external main is the first step. The hose can be crushed by heavy equipment, furniture, or simply twisted during installation. It is also worth making sure that the end of the hose, lowered into the sewer pipe or attached to a hook, is not too deep in the water, which can create a siphon effect and prevent the drain from escaping.
If the outer part of the highway is intact, it is necessary to check its passability. Disconnect the hose from the sewer riser and lower it into the prepared container. Start the “Drain” or “Spin” mode. If the water flows freely, then the problem is a clog in the sewer pipe or siphon of the sink/bathtub to which the machine is connected.
Check the height of the drain hose: it should be 60-90 cm from the floor. A position that is too low can lead to constant gravity flow of water, and a position that is too high can overload the pump.
Internal kinks in the hose are also possible, especially if the machine is unstable and vibrates during the spin cycle. Vibration can dislodge the unit, and the hose will rest against the wall of a niche or cabinet. Make sure that there is sufficient clearance behind the back panel of the device for the normal position of communications.
Drain filter clogged: cleaning and maintenance
The most common reason why water does not drain, is a banal filter clog. This element is designed to protect the pump from large objects: buttons, coins, bra underwires and lint. Over time, the trash can becomes clogged and water stops flowing through the system.
The filter is usually located on the lower right side of the front panel of the machine, hidden behind a decorative plug or small door. To access it you will need a flat container to collect residual water and a rag. Before unscrewing the plug, be sure to turn off the water supply and disconnect the device from the power supply.
☑️ Filter cleaning algorithm
After removing the filter, carefully inspect it and the internal cavity. Often this is where small objects get stuck and block the impeller. Rinse the element thoroughly under running water, removing any accumulated slimy deposits. A dirty filter is not only the reason the drain stops, but also the source of an unpleasant odor.
⚠️ Attention: When unscrewing the filter plug, about 300-500 ml of water will pour out of the machine. Be prepared to quickly replace the container so as not to wet the floor and electrical wiring.
If after cleaning the filter the situation has not changed and water is still standing in the tank, then the problem lies deeper. Perhaps the debris has passed further and got stuck in the pipes or the pump unit itself. In this case, a more in-depth diagnosis of the system will be required.
Malfunctions of the drain pump (pump)
The drain pump, or pump, is the heart of the drainage system. It is this that creates the pressure that pushes water out of the tank. If the filter is clean, the hose is free, and the water does not drain, there is a high probability of failure of this unit. The pump can fail for various reasons: wear of the winding, jamming of the impeller or destruction of the bearings.
Diagnostics begins by listening to the operation of the machine. If, when you turn on the drain mode, you hear a characteristic hum or hum, but the water stands still, the impeller may be blocked by a foreign object. If there is complete silence or a crackling noise is heard, most likely the motor winding has burned out or a contact has broken.
How to check a pump with a multimeter?
To check, you need to remove the pump, disconnect the chip and measure the winding resistance. The normal value varies in the range of 150-200 Ohms. If the device shows infinity or zero, the pump is faulty and requires replacement.
A common problem is the wear of the plastic impeller. Over time, the blades can become worn or cracked, causing the pump to hum but not pump water as hard as it should. This can be determined visually only after dismantling the unit. Pump replacement is a procedure of medium complexity, accessible if you have basic repair skills.
It is important to consider that the operation of the pump is affected by the voltage in the network. Voltage surges can damage the electronic control board that sends the signal to start the pump. Therefore, before replacing an expensive component, you should make sure the integrity of the electrical circuits.
Problems with pipes and internal connections
There are rubber pipes located between the tank and the drain pump, as well as between the pump and the outlet hose. These elements are flexible and subject to wear. Over time, dirt can accumulate in the bends of the pipes, forming a dense plug that blocks the flow of water.
In addition to clogging, the pipes may become mechanically damaged or lose their tightness. Cracks in the rubber lead to leaks, but if the hole is small, water may simply leak onto the floor without creating enough pressure to drain properly. A visual inspection of the corrugation for cracks and abrasions is mandatory.
To check the internal pipes, partial disassembly of the machine body is often required. The top cover and possibly the front or side panel will need to be removed to access the connections. Having disconnected the pipe, you can make sure that it is passable by blowing it out or rinsing it with water.
| Symptom | Possible reason | Solution method |
|---|---|---|
| The pump hums, the water does not drain | The impeller is jammed or there is a blockage in the pipe | Cleaning the system, removing foreign objects |
| Silence when draining | The pump winding is burnt out or there is no signal from the board | Pump replacement or electronics repair |
| The water goes away slowly | Partially clogged filter or hose | Washing the filter and checking the hose |
| Error on display (E10, E20, etc.) | Problem with level sensor or drain | Error code diagnosis, circuit check |
The pipes are the weak point of the system. Every time you clean the filter, check their condition, as rubber parts will harden and crack over time.
Electronics: level sensors and control module
Modern washing machines are controlled by sophisticated electronics. If the mechanical part is working properly, the problem may lie in the “brains” of the device. The main element that controls the water level is the pressure switch (level sensor). If it transmits incorrect data, the control module may “think” that the tank is empty and not turn on the pump, or vice versa, block the drain.
A pressure switch is a device with a tube connected to a tank. Clogging of this tube or oxidation of the contacts of the sensor itself leads to incorrect operation. It is also possible that the control module itself may fail, where the tracks or relay responsible for turning on the pump could burn out.
Electronics diagnostics require special knowledge and equipment. Checking the pressure switch often involves purging the tube and checking for clicks when the pressure changes. Repairing the control board at home is only possible if you have experience working with a soldering iron and circuits.
Often electronics block the drain as a defensive reaction. For example, if the temperature of the water in the tank is too high, the machine will not give the command to drain, so as not to damage the sewer pipes or pump. In such cases, you need to wait for the water to cool or check heating element and thermostat.
Specific errors and fault codes
Most modern models Indesit, Bosch, LG and other brands are equipped with a self-diagnosis system. If a problem occurs with draining, the machine not only stops, but displays an error code on the display. Deciphering this code is the fastest way to understanding the problem.
Codes may vary depending on manufacturer. For example, at Samsung this could be a 5E or SE error, Electrolux — E20, y Beko — E18. The presence of a code narrows the search: it may specifically indicate a blockage, a pump malfunction, or a wiring problem.
However, you should not blindly trust the codes. Electronics can make mistakes too. If the code indicates the pump, but it hums and spins, the problem may be in the hydraulic part (clogging), which the sensors interpret as the pump not working. Always keep the display readings with the actual state of the nodes.
⚠️ Attention: Resetting the error by turning off the machine from the outlet does not eliminate the cause of the breakdown. Once turned on, the cycle may repeat and the water will remain in the tank again.
Prevention and operating rules
To prevent the question “why the water isn’t draining” from coming up to you regularly, you must follow the operating rules. Regular maintenance prolongs the life of the drain system and prevents costly repairs. The main enemy of drainage is foreign objects in clothing pockets.
Always check pockets before loading laundry. Coins, paper clips, keys and small debris are the main causes of impeller jams. Using special laundry bags for delicate items also helps contain fine lint and parts that can clog the filter.
It is recommended to carry out preventative cleaning of the filter and checking the drain hose every 3-6 months, even if there are no visible problems. The accumulation of dirt occurs gradually, and timely cleaning will prevent the formation of dense traffic jams. It is also useful to periodically run a drum cleaning cycle using special products.
Lifehack for cleaning a hose
Once a year, you can rinse the drain hose with a citric acid solution by running the empty wash at high temperature. This will help dissolve fatty deposits inside the corrugation.
Following these simple rules will allow your washing machine to operate reliably for many years. If a problem does arise, now you know where to start diagnosing and how to safely fix most problems on your own.
What should I do if the water does not drain, but there are no errors on the screen?
The absence of an error code often indicates a mechanical blockage (clogging) or a malfunction of the pump itself, which physically cannot turn the impeller. Start by cleaning the filter and checking the hose. If the mechanics are in order, the pump winding may have burned out and it simply does not respond to commands, but the electronics have not yet detected an open circuit.
Is it possible to drain the water manually if the machine breaks down?
Yes, it's possible. You need to open the filter hatch, place a low container and slowly unscrew the cap, allowing the water to flow out in portions. If the filter cannot be removed, the water can be scooped out through a drum or the drain hose can be disconnected from the sewer and lowered into a basin below the level of the tank (using the law of communicating vessels or a pump).
Why does the machine take in water and immediately drain it?
This phenomenon is called "gravity flow". The reason lies in the incorrect connection of the drain hose. If its end is too low (below 60 cm from the floor level) and does not have a special valve or bend, the water will flow away by gravity, and the level sensor will constantly require refilling. It is necessary to raise the hose to the desired height.
How often should the drain pump be replaced?
The drain pump does not have strict replacement regulations. With proper use and regular cleaning of the filter, it will last 5-10 years. Replacement is required only when symptoms of a malfunction appear: noise, humming without draining, or complete failure of operation.