AEG dishwasher does not drain water: do-it-yourself diagnostics and repairs

Dishwasher AEG Has the water stopped draining after the wash cycle? There is dirty liquid in the pan, and the program freezes at the draining stage or gives an error? This problem occurs in models AEG Favorit 5000, AEG 6000, AEG 8000 and other series - both new and used. In 80% of cases, the malfunction can be fixed independently, without resorting to expensive service repairs.

In this article we will look at all possible reasonswhy PMM AEG does not drain water: from a banal blockage to failure of the drain pump or electronic module. You will receive step-by-step instructions with photos, diagnostic checklists, error coding tables and prevention tips. And if the problem turns out to be more serious, you will find out how much repairs will cost at the service station and how to save on spare parts.

1. First steps: what to check before disassembling the machine

Before disassembling AEG dishwasher and look for damage inside, exclude external factors. Often the problem lies in trivial things that users do not pay attention to.

Start with an inspection drain hose and sewer connection:

• 🔍 Kink in the hose. Run your hand along the entire length - if there are creases, straighten them. The hose should lie freely, without tension.
• 🚫 Siphon blockage. If the machine is connected to a sink, check the trap underneath. Often food debris and fat accumulate there.
• 💧 Drain height. The hose must rise to a height 40–60 cm from the floor (see instructions for the model). If it lies lower, the water does not drain away by gravity.
• 🔌 Power and errors. Look at the display: if the code is on E20, E21 or E24 - the problem is in the drain. Other errors may indicate other problems.

Also make sure that coarse filter (located on the bottom of the machine) is not clogged. It needs to be cleaned at least once a month - especially if you are washing heavily soiled dishes. Instructions for cleaning the filter are in the user manual AEG (section "Care and Maintenance").

⚠️ Attention: If the machine makes a hum, but the water does not drain - never run the program again without eliminating the cause. This can lead to overheating of the pump and its eventual failure.

2. Blockage in the drain system: how to clean it without calling a technician

The most common reason why dishwasher AEG does not drain water - clog in the drain line. It can be in one of four places:

1. Coarse filter (at the bottom of the car).
2. Drain hose (from the car to the sewer).
3. Pipe (connects the pump to the hose).
4. sewer pipe or siphon.

Let's start with the simplest thing - filter cleaning:

1. Unplug the machine.
2. Remove the lower dish basket.
3. Turn the filter (located in the center of the bottom) counterclockwise and pull it out.
4. Rinse under running water to remove any remaining food and grease.
5. Clean the hole under the filter from debris (you can use a toothpick).

If the filter is clean, but the water still does not drain, check drain hose:

• 🔧 Disconnect the hose from the car and sewer.
• 💦 Rinse it under water pressure. If the blockage is severe, clean it with a wire or cable.
• 🔄 Check if the siphon is clogged (if the machine is connected to a sink).

If after these manipulations there is still water in the machine, the blockage may be in nozzle or pump. To get to them, you will need to partially disassemble the car (more on this in the next section).

3. Drain pump malfunctions: how to diagnose and replace

If there are no blockages, but PMM AEG still does not drain the water, the problem may lie in drain pump (to the pump). He is responsible for pumping water from the car to the sewer. Signs of pump failure:

• 🔇 Car buzzing, but the water does not go away.
• 🚫 An error appears on the display E20, E21 or E24.
• 💦 After draining, water remains in the pan.
• 🔌 The pump does not turn on at all (no sound of operation).

To check the pump, you need to get to it. Most models AEG (for example, AEG Favorit 6000) it is located at the bottom of the machine under the filter. Disassembly instructions:

1. Unplug the machine and turn off the water.
2. Remove the bottom panel (it is secured with latches or screws).
3. Disconnect the drain hose and fitting from the pump.
4. Remove the pump by unscrewing the mounting screws (usually 2-3 pieces).

Now check the pump for functionality:

• 🔍 External inspection: Are there any cracks, melts or traces of water inside.
• 🔄 Turn the impeller by hand - it should rotate freely, without jamming.
• 📋 Ring the winding multimeter (resistance should be 150–300 Ohm).

If the pump is faulty, it must be replaced. Cost of a new pump for AEG - from 2,500 to 5,000 ₽ depending on the model. Service replacement will cost 1 500–3 000 ₽.

⚠️ Attention: When installing a new pump, make sure that sealing rubber bands on the spot. If they are damaged, water will leak and the machine will stop draining again.

How to test a pump without a multimeter?

If you don’t have a multimeter, connect the pump directly to a 220V network (carefully!). The working pump will hum and rotate the impeller. If nothing happens, the pump has burned out.

4. Problems with the pressure switch (water level sensor)

If the pump is working, but dishwasher AEG still doesn't drain the water, maybe it's the culprit pressure switch (water level sensor). It signals the control module about the amount of water in the machine. If the pressure switch is broken, the machine “does not understand” that it is time to drain the water.

Signs of a malfunctioning pressure switch:

• 💧 The machine takes in too much or too little water.
• 🔄 The program freezes at the draining or rinsing stage.
• 🚫 An error appears on the display E15 or E16 (level sensor errors).

To check the pressure switch, you need to get to it. In models AEG it is usually located at the bottom of the machine near the pump. Diagnostic algorithm:

1. Remove the bottom panel of the machine.
2. Find a pressure switch - this is a small round sensor with a tube.
3. Remove the tube and blow it out - it should be clean.
4. Test the sensor contacts with a multimeter (the resistance should change as the water level changes).

If the pressure switch is faulty, it must be replaced. The cost of a new sensor is from 1,200 to 2,500 RUR. Installation at the service will cost 1 000–1 500 ₽.

Error code	Meaning	Possible reason	Solution
E20	Drain error	Blockage, faulty pump, problems with the pressure switch	Clean the system, check the pump and sensor
E21	Water does not drain within the allotted time	Low pressure, blockage, pump malfunction	Check water pressure and drainage path
E24	Drainage problem	Clogged pipe or hose	Clean the drain system
E15	Water level sensor error	The pressure switch or tube is faulty	Check and replace the pressure switch

5. Failure of the electronic control module

If all mechanical elements are in good order, but PMM AEG still does not drain the water, the problem may be control module (board). This is the “brain” of the machine, which controls all processes, including draining. Signs of module malfunction:

• 🔄 The machine turns on, but the programs are confused or do not start.
• 🚫 Random errors appear on the display or the machine freezes.
• 💡 The indicators blink chaotically.

It is difficult to diagnose the module yourself - this requires special equipment. But you can inspect the board visually:

• 🔍 Check if there is melted elements, darkened or swollen capacitors.
• 💧 Make sure there are no marks on the board oxidation or moisture.
• 🔌 Check all connectors - they must be tightly connected.

If the module is faulty, it can be:

• 🔧 Repair (in service, cost - from 2 000 ₽).
• 🆕 Replace (a new board costs from 5,000 to 12,000 RUR depending on model).

⚠️ Attention: If you are not electronics savvy, do not attempt to repair the module yourself. Incorrect actions can lead to short circuit or permanent breakdown of the machine.

6. Other possible causes and prevention of problems

If none of the above reasons apply, check a few more things:

• 🔌 The socket or plug is faulty. Make sure the machine is receiving sufficient power. Try connecting it to a different outlet.
• 💧 Low water pressure. If the pressure is weak, the machine may not drain the water completely. Check the tap and supply hose.
• 🔄 Program crash. Try resetting the machine to factory settings (instructions are in the user manual).

To avoid drainage problems in the future, follow these simple rules:

• 🧼 Clean the filter after each wash cycle (especially if you wash greasy dishes).
• 🚫 Do not put in the car leftover food, bones, shells and other large waste.
• 💧 Use salt and rinse aid — they reduce water hardness and prevent scale formation.
• 🔧 Check the drain hose once every 3–6 months to check for kinks and blockages.

7. When to call a technician: the cost of repairs in the service

If you have checked all possible reasons but dishwasher AEG It still doesn’t drain the water, it’s time to contact service. Here are the estimated prices for repairs in Moscow and the regions (2026):

Type of repair	Cost (₽)	Deadlines
Diagnostics	500–1 500	30–60 min
Replacing the drain pump	3 500–6 000	1–2 days
Replacing the pressure switch	2 500–4 000	1 day
Control module repair	4 000–10 000	3–5 days
Cleaning the drain system	1 500–3 000	1–2 hours

Cost may vary depending on:

• 📍 Region (in Moscow and St. Petersburg prices are higher than in small cities).
• 🔧 Difficulties of repair (for example, replacing a module is more expensive than cleaning a hose).
• 🆕 Availability of spare parts (original parts for AEG can be supplied to order).

Before agreeing to repair, ask the technician:

• 📋 Compose defective statement indicating all faults.
• 💰 Name exact cost works and spare parts.
• ⏳ Specify repair time (especially if the car is under warranty).

If the car is under warranty, repairs should be free (provided that the breakdown is not your fault). Contact AEG authorized service center — addresses can be found on the official website of the brand.

FAQ: Frequently asked questions about draining water into the AEG PMM

The machine hums, but the water does not drain. What to do?

Most likely the problem is clog or faulty pump. Start by cleaning the filter and drain hose. If it doesn’t help, check the pump (see section 3).

Error E20 appears on the display. How to fix it?

Error E20 indicates a problem with the drain. Check:

• Kinked drain hose.
• Filter for clogs.
• Pump operation (it should hum).

If everything is in order, but the error remains, the pressure switch or control module may be faulty.

Is it possible to drain the water manually?

Yes, but carefully:

1. Unplug the machine.
2. Place a container under the bottom panel.
3. Remove the filter and tilt the machine back - the water will drain out by gravity.
4. Or, disconnect the drain hose from the drain and place it in a bucket.

⚠️ Do not use for draining vacuum cleaner or other attachments may damage the machine.

How much does a new pump cost for an AEG Favorit 6000?

The cost of a pump (pump) for AEG Favorit 6000 - from 2,500 to 4,500 ₽ depending on the supplier. Original spare parts are more expensive, but last longer. Service replacement will cost 1 500–2 500 ₽.

How often do you need to clean the filter in the AEG PMM?

It is recommended to clean the filter after every 3–5 wash cycles, but not less often once a month. If you wash heavily soiled dishes (for example, after frying), clean them after each use.