Washing machine DEXP suddenly stopped and a code appeared on the display E21? Do not rush to panic and call a specialist. In most cases, this error is associated with problems in the water drainage system, which you can fix yourself. Code E21 indicates that the machine is unable to drain water within the specified time, either due to a blockage or a faulty pump or electronic components.

In this article we will analyze all the possible causes of the error. E21 in washing machines DEXP, from banal blockages to serious breakdowns. You will learn how to carry out diagnostics without special tools, which components to check first, and when you really need the help of a professional. And most importantly, we will give step-by-step instructions with photos and tips on how to fix the problem at minimal cost.

Let us note right away: if your car is under warranty, do not risk repairing it yourself. Certain actions (such as disassembling the pump) may void your warranty. In this case, it is better to contact the service center DEXP.

What does error E21 mean in a DEXP washing machine?

Code E21 in cars DEXP stands for water drain error. This means that within a specified time (usually 5–10 minutes) the controller did not receive a signal about the successful completion of the drain. The machine can stop at any stage of the wash - after rinsing, spinning, or even at the beginning of the program.

Unlike errors related to water heating (e.g. E01 or E02), E21 always indicates problems in the drainage system. It could be:

  • 🔧 Blockage in the drain hose, filter or pipe
  • 💧 Pump fault (pump)
  • 📱 Damage to the water level sensor (pressostat)
  • 🔌 Power problems pump or control module

Some models DEXP (for example, DEXP WMS-60P85W or DEXP WMS-80P106W) error E21 may be accompanied by blinking indicators on the panel. If together with E21 other symbols are lit (for example, a lock or key icon), this may indicate that the hatch is blocked due to the tank being overfilled.

📊 Which error code have you encountered most often in your washing machine?
E21 (drain)
E01/E02 (heating)
E11/E12 (water filling)
Other code
There were never any mistakes

Reasons for error E21: from simple to complex

In order not to waste time on useless actions, diagnostics should be carried out according to the principle “from simple to complex.” Start by checking for obvious causes that do not require disassembling the machine.

Here top 5 reasons errors E21 in order of probability:

  1. Drain filter clogged - the most common problem (in 60% of cases). The filter becomes clogged with lint, threads, coins and other small objects.
  2. Kinked or clogged drain hose. Sometimes the hose gets crushed by furniture or becomes clogged with lime deposits.
  3. Pump malfunction. Pump blades can become jammed due to foreign objects or wear.
  4. Breakdown of the pressure switch (water level sensor). If the sensor transmits incorrect data, the machine “thinks” that the water has not been drained.
  5. Control module failure. Less often, but it happens, especially after power surges.

Interesting fact: in 15% of cases there is an error E21 arises due to incorrect connection to the sewer. If the drain hose is installed too high (above 1 meter from the floor), the water physically cannot drain by gravity, and the pump is overloaded.

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Before starting diagnostics, be sure to unplug the machine and turn off the water supply tap. This will protect you from short circuits and floods.

How to resolve error E21: step-by-step instructions

If you are ready to try to repair the car yourself, follow this algorithm. Let's start with the simplest steps.

Step 1: Check the drain filter

The filter is located at the bottom of the machine, behind a small cover (usually on the right). To clean it:

  1. Place a rag or a low tray under the machine - water may spill out of the filter.
  2. Unscrew the filter counterclockwise. If it does not give way, do not apply excessive force - there may be a foreign object holding it.
  3. Remove all debris from the filter and rinse it under running water.
  4. Check the hole in the machine for blockages (you can use a flashlight).

If the filter was heavily clogged, after cleaning it the error E21 must disappear. Run a test wash on the Rinse + Spin cycle to check the drainage.

Step 2: Diagnose the drain hose

Make sure the hose is not kinked or pinched. Disconnect it from the sewer and check the passage:

  • 🔦 Shine a flashlight into the hose - if the light does not pass through, it means there is a blockage.
  • 💦 Rinse the hose under water pressure (you can use a shower hose).
  • 🔧 If the blockage is dense, use a plumbing cable or wire.

Drain filter cleaned

Drain hose washed

Checked that there are no kinks in the hose

Make sure the connection to the sewer is correct

Test run of the machine -->

Step 3: Checking the pump (pump)

If the filter and hose are clean, but there is an error E21 remains, you will have to check the pump. In cars DEXP it is located at the bottom of the housing, next to the filter. To get to it:

  1. Remove the bottom panel of the machine (usually it is secured with latches or screws).
  2. Disconnect the wires from the pump (memorize or photograph their location!).
  3. Check the pump blades for blockages. Often threads, hair or coins get stuck there.
  4. Turn the blades by hand - they should rotate freely, without jamming.

If the pump does not rotate or makes strange noises, it will have to be replaced. Cost of a new pump for DEXP — from 1,500 to 3,000 rubles depending on the model.

How to test a pump with a multimeter

1. Set the multimeter to resistance measurement mode (200 ohms).

2. Connect the probes to the pump contacts.

3. Normal resistance is 150–200 Ohms. If the device shows "1" (open) or "0" (short circuit), the pump is faulty.

Step 4: Diagnostics of the pressure switch and control module

If all mechanical elements are in order, the problem may lie in the electronics. Pressostat (water level sensor) is located on the top of the machine, next to the tank. To check it:

  • 🔌 Disconnect the hose from the pressure switch and blow it out - it should be clean.
  • 📊 Check the sensor contacts with a multimeter. When the pressure changes (you can blow into the hose), the resistance should change.

If the pressure switch is working, but there is an error E21 there may still be a problem control module. In this case, you cannot do without the help of a specialist - board repair requires special skills and equipment.

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In 90% of cases, error E21 is eliminated by cleaning the filter, hose or pump. Only 10% of breakdowns are related to electronics and require professional repair.

Table: Common causes of error E21 and solutions

Reason for error Signs How to fix Repair cost (RUB)
Drain filter clogged The machine does not drain water, the filter does not rotate Cleaning the filter 0 (on your own)
Drain hose clogged The water goes away slowly or not at all Flushing the hose, removing blockages 0–300 (if a cable is needed)
Pump fault The pump hums, but does not pump water; the blades do not rotate Replacing the pump 1 500–3 000
Breakdown of the pressure switch The machine incorrectly determines the water level, the error appears chaotically Replacing the sensor 800–1 500
Control module failure The error appears for no apparent reason, the car behaves unpredictably Board diagnostics and repair 2 000–5 000

What to do if error E21 appears after repair

It happens that after cleaning the filter or replacing the pump an error E21 returns. This may indicate:

  • 🔄 Incorrect assembly - for example, they forgot to connect the wires to the pump or installed the filter unsealed.
  • 💡 Damaged wiring when disassembling. Check all contacts for oxidation or breakage.
  • 🔧 Poor quality spare parts. If the pump or pressure switch has been replaced with a non-original one, it can quickly fail.

Important: after any repair of the drainage system, be sure to run the machine in the “Self-Cleaning” or “Rinse” mode without laundry. This will help remove any remaining debris and test the pump's performance under load.

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If after replacing the pump the machine still does not drain water, check whether the impeller is installed correctly. It should rotate clockwise (as viewed from the engine side).

When to call a repairman: signs of a serious breakdown

Not all breakdowns can be fixed on your own. Contact the service center if:

  • ⚡ Error E21 appears along with other codes (for example, E11 or E31).
  • 🔌 The machine does not respond to buttons, does not turn on or turns off spontaneously.
  • 💦 Water is leaking from under the car (this may indicate damage to the tank or pipes).
  • 🔊 The pump makes uncharacteristic sounds (grinding, squealing) - this is a sign of mechanical wear.

Average cost of diagnostics at service centers DEXP - from 500 to 1,000 rubles. If the problem is in the control module, repairs can cost 3,000–6,000 rubles. In some cases, it is cheaper to buy a new car, especially if your model is more than 7-8 years old.

⚠️ Attention: If the machine is under warranty, do not open the case yourself! This will void the warranty. Contact an authorized service center DEXP with receipt and warranty card.

Prevention of error E21: how to avoid problems in the future

To make a mistake E21 does not appear again, follow these recommendations:

  • 🧺 Wash items with pockets only in special bags - coins, keys and other small items often cause blockages.
  • 🧼 Use only high-quality powders and conditioners. Cheap products can leave residue on parts.
  • 🚿 Clean the drain filter once every 3 months, even if the machine is working normally.
  • 💧 Don't overload the car. The maximum weight of the laundry is indicated in the instructions for the model.
  • ⚡ Connect the machine through a voltage stabilizer - power surges can damage the control module.

If you have hard water in your area, install softening filter or periodically clean the machine with citric acid (100 g per 60°C program). This will prevent scale formation on the pump and heating element.

FAQ: Frequently asked questions about error E21 in DEXP washing machines

Is it possible to reset error E21 without repair?

Yes, sometimes resetting the error helps. To do this:

  1. Unplug the machine for 10-15 minutes.
  2. Turn it back on and select the "Rinse + Spin" program.
  3. If the error disappears, but the machine does not drain the water, the problem is mechanical (clogging or pump).

If the error appears again, repair is required.

How much does it cost to replace the pump in a DEXP washing machine?

The cost depends on the model and region:

  • The pump itself (pump) costs 1,500–3,000 rubles.
  • The work of a master is 1,000–2,500 rubles.

Total: 2,500–5,500 rubles. Some services offer used parts cheaper.

Can error E21 appear due to an incorrect connection to the sewer?

Yes, if:

  • The drain hose is connected too high (more than 1 m from the floor).
  • The hose is inserted into the sewer without siphon (water may return back to the machine).
  • The hose diameter does not meet the requirements (must be at least 19 mm).

Check that the hose is connected with a bend (elbow) and is not lying on the floor.

How often should the drain filter be cleaned?

Recommended Frequency:

  • With regular use - once every 3 months.
  • If you wash woolen items or clothes with lint - once every 1-2 months.
  • After washing heavily soiled items (carpets, shoes) - immediately after the cycle.
Can error E21 cause other parts to fail?

Yes, if you ignore the problem:

  • 🔥 Overheating the pump can completely damage it.
  • 💧 Stagnation of water leads to mold and unpleasant odor.
  • ⚡ Constant overloads can damage the control module.

We recommend eliminating the error the first time it appears.