The situation when washing machine stops draining water, taking many housewives by surprise. The drum is full of dirty foam, and the wash cycle freezes halfway, ignoring commands. At this moment, it is important not to panic, since in 80% of cases the problem is solved without calling an expensive technician. Modern units, whether Indesit, Bosch or LG, such failures are often signaled by error codes, but even without them, the troubleshooting algorithm is the same.
Before disassembling the equipment, it is necessary to completely disconnect the device. Water and electricity are a deadly combination, so any manipulation of the pump or wiring is permissible only after unplugging the cord from the outlet. Next, you should assess the scale of the disaster: is the water in the tank completely standing or is it draining slowly, leaving puddles on the floor. The further repair strategy will depend on this.
Often the cause of a banal failure is a simple blockage or a pinched hose, and not a breakdown of the electronics. In this article we will analyze in detail all stages of diagnostics, from simple checks to complex repairs. drain pump. You'll learn how to safely remove foreign objects and know when it's actually time to buy a new pump.
Primary diagnostics and error codes
Modern models of washing machines are equipped with a self-diagnosis system. If draining water is broken, the display often lights up with a specific code. For example, at Samsung it could be E5 or E2, y Bosch — E18 or F18, and Electrolux — E20. Deciphering a specific code in the user manual immediately narrows the search range, indicating a problem in the pump or a clog in the filter.
However, if there is no display or the code is not displayed, you should pay attention to the behavior of the equipment. The machine may hum while trying to start the pump, or it may simply stop and flash the lights. Sometimes electronic module blocks the drain due to a program failure. In this case, a full reset helps: unplug the device for 15-20 minutes, then turn on the “Drain” or “Spin” mode.
It is important to listen to the sounds the unit makes. If you can hear the characteristic hum of the motor, but the water stays still, it means that the mechanism is working, but something is preventing it. If there is deathly silence at the moment when you should be working drain pump, the problem may lie in the lack of voltage at the terminals or a burnt out winding.
⚠️ Attention: Don't ignore repeated drain errors. Constantly idling the engine or trying to pump water through a dense blockage can lead to overheating and final failure of expensive components.
To accurately understand the problem, it is useful to know the main symptoms:
- 💧 There is water in the tank, the pump is silent - the pump is probably burned out or there is no contact.
- 🔊 The pump hums, but does not pump - the impeller is jammed or the pipe is clogged.
- 🌊 The water drains very slowly - there is a partial blockage in the sewer or hose.
- ⚡ The machine knocks out plugs when the drain is turned on - a short circuit in the pump circuit.
Checking the drain hose and sewer
The most common, but common reason is a mechanical obstacle in the path of water. First check drain hose. It can be bent if the machine is too close to the wall, or crushed by heavy furniture. Straighten the corrugation along its entire length and make sure that there are no sharp creases blocking the flow of liquid.
The second important point is the installation height of the hose. If the end of the hose is lowered too low (below 50 cm from the floor), a siphon effect may occur when water flows out by gravity during collection, or, conversely, back pressure can be created from the sewer. The correct position is fixed using a special plastic hook on the rear wall of the machine. The optimal height of the entrance to the sewer is from 60 to 90 cm.
Don’t forget about the condition of the sewer pipe itself. If other plumbing fixtures (sink, bathtub) also do not drain water well, the problem is not in the washing machine. In this case hydraulic valve may be clogged, and the water simply has nowhere to go. The check begins by opening the faucet in the sink: if the water is stagnant, call a plumber to clean the common pipe.
☑️ Checking the hose and sewer
Cleaning the drain filter
The drain filter is the first line of defense for your equipment. This is where coins, buttons, lint and bra underwires are collected. It is usually located in the lower right corner behind the decorative panel. Before unscrewing the lid, be sure to lay out a rag and prepare a flat tray, as about 0.5–1 liters of dirty water will flow out of the hose.
The cleaning process is simple: unscrew the cap counterclockwise. If it does not give way, do not use excessive force - there may be a large object stuck inside that is preventing rotation. Gently shake the cork or use pliers, after protecting the plastic with a rag. After removing the filter, rinse it thoroughly under the tap, removing all dirt.
Be sure to look inside the hole where the filter was. There is pump impeller. Try twisting it with your finger (be careful, the edges may be sharp). It should rotate freely, with slight resistance from the magnets. If the impeller is jammed or rotates with difficulty, it means that small debris or a bone has gotten inside, which needs to be removed with tweezers.
What to do if the filter is stuck?
If the filter plug has not been unscrewed for years, it could have become “stuck” due to scale and corrosion. Try warming up the area around the filter with a hairdryer (without overheating the plastic) or generously pouring WD-40 onto the threads and wait 15-20 minutes. In extreme cases, you have to carefully break apart the old filter to extract the remains, but this requires completely disassembling the bottom of the machine.
Diagnostics and replacement of the drain pump (pump)
If the filter is clean, the hose is free, and the water does not flow out, it is most likely damaged drain pump (pump). This is a consumable material, the service life of which is on average 3-5 years of active use. Signs of a faulty pump include failure to respond to drain commands, a humming sound without spinning, or a distinctive smell of burnt insulation.
To check the pump you will need a multimeter. Remove the bottom panel of the machine (or lay it on its side if the design does not allow you to remove the bottom), find the pump and disconnect the chip with wires. Switch the tester to resistance measurement mode (Ohm) and attach the probes to the pump contacts. The normal winding resistance of a working motor is from 150 to 300 Ohms. If the device shows one (open) or zero (short circuit), the part must be replaced.
Replacement drain pump - the procedure is simple. After purchasing a new part (it is important to know the model of your machine or the markings of the old pump, e.g. Askoll, Plaset, Zanussi) unscrew the mounting screws, disconnect the pipes and install a new unit. Don't forget to check the integrity of the rubber seals on the pipes - if they are cracked, replace them to avoid leaks.
Replacing the drain pump is the most common repair for the “won’t drain” problem. The cost of the part is low, and self-installation takes 20-30 minutes.
Blockages in pipes and internal lines
Sometimes debris passes through the filter or comes off the laundry and gets stuck in the connecting pipes. The corrugated rubber hoses inside the machine have bends where dirt, hair and threads often accumulate. The area between the tank and the pump, as well as the connection between the pump and the main drain hose, is especially likely to become clogged.
To diagnose these areas, it is necessary to partially disassemble the machine: remove the top cover, unscrew the front panel and gain access to the insides. Visually inspect all rubber connections. If swelling or compaction in the corrugation is visible to the touch or visually, the pipe must be removed and washed under strong water pressure. Use a bottle brush to remove stubborn dirt.
Pay special attention to the area where the pipe connects to the tank. A “plug” of mucus and lint often forms there, which allows water to drip through, but does not allow the pump to create the required pressure. Regular preventative cleaning of these lines every 2-3 years will extend the life of your equipment.
Below is a table of common symptoms and their corresponding faults:
| Symptom | Probable Cause | Difficulty of repair |
|---|---|---|
| The pump is silent, there is a lot of water | Pump burned out, no power, module failure | Average |
| The pump is humming, but the water does not flow out | Impeller jammed, hose clogged | Low |
| The water goes away slowly | Clogged filter, sewer or pipes | Low |
| Error draining after spinning | Low pressure, clogged, worn motor brushes | Average |
Problems with the electronic control module
If all mechanical parts are in good working order, the hoses are clean, and the new pump is working, but the drain command is not received, the problem lies in the “brains” of the machine - electronic control module. The triac responsible for supplying voltage to the pump could burn out due to a power surge or moisture ingress.
Module diagnostics require special knowledge and equipment. Visually, traces of burning, swollen capacitors or black traces may be visible on the board. However, most often the burnt element appears intact. In such cases, the module is either taken for repair (resoldering of the triac and tracks) or replaced entirely, which is an expensive procedure.
Sometimes the problem is solved by flashing it or resetting the error if the failure was software. Try running test mode. The button combinations differ for different brands. For example, on some models Bosch you need to hold down the “Drain” button and turn the selector to the “Spin” position. On LG Often the temperature and washing mode buttons are pressed simultaneously when turned on.
⚠️ Attention: Repairing an electronic module with your own hands without experience with a soldering iron and electronic circuits can lead to complete failure of the machine. If you are not confident in your abilities, it is better to contact a professional master.
To extend the life of the drain pump, use special laundry detergents (gels, capsules) instead of low-quality powders that form a lot of foam and sediment, and also regularly use descaling agents.
Frequently asked questions (FAQ)
Why does the washing machine hum when draining, but does not pump water?
A humming sound indicates that electricity is being supplied to the pump and the motor is trying to operate. Most likely, the impeller is jammed by a foreign object (coin, bone) or it is overgrown with scale. The pump shaft bearings may also wear out. The pump must be removed, cleaned or replaced.
Is it possible to drain the water manually if the machine is not running?
Yes, this can be done through the drain filter. Place a flat container and slowly unscrew the filter plug. The water will flow by gravity. If the filter is located high or water does not flow, you can remove the drain hose from the sewer, lower it into a basin below the level of the tank, and the water will drain according to the law of communicating vessels.
How often should the drain filter be cleaned?
It is recommended to carry out preventive cleaning of the drain filter every 3-6 months, depending on the frequency of washing. This will prevent blockages, unpleasant odors and extend the life of the drain pump.
What does error code E10 or E20 mean on a washing machine?
Codes E10, E20, E21, F05 and similar in different brands (Electrolux, Zanussi, Ariston) most often indicate problems with water drainage: blockage, pump or pressure switch malfunction. Always refer to the instructions for your specific model for the exact decoding.