Xiaomi vacuum cleaner does not wash the floor: water does not come in - what to do?

Your Xiaomi washing vacuum cleaner stopped supplying water and the indicators are burning as usual? This is one of the most common problems with Mi Robot Vacuum-Mop 2 Pro, Dreame W10 and other wet cleaning devices. 80% of the time, the malfunction is not due to a pump breakdown, but to a clog or build error. We analyzed service center reports and user reviews, and compiled a checklist of 7 reasons why water does not go to the napkin.

In this article, you will find step-by-step diagnostic instructions (with photos and videos), an error code table, and tips on how to avoid repeated blockages. If the Xiaomi vacuum cleaner turns on but does not spray water, do not rush to bring it to the service: in 6 out of 10 cases, the problem can be fixed by yourself in 10-20 minutes.

1. Basic check: water, filters and tank cover

Start with the obvious -- but that's what 90 percent of users miss out on. Xiaomi's washing vacuum cleaner doesn't deliver water if:

• 💧 There is no water in the tank — yes, it sounds silly, but the level sensor may not work properly if the liquid is too small (less than 100 ml).
• 🔌 The tank cover is loosely closed - the micro-switch contacts do not close and the system blocks the supply.
• 🧹 The rough filter is clogged - even small debris (hair, thread) can block the channel.

How to check:

1. Open the tank lid and add the water to the MAX mark (use only distilled or filtered water - lime plaque clogs the tubes!).
2. Remove the rough filter (usually located under the tank lid) and rinse it under running water. If it has white coating, soak it in vinegar (1:1 with water) for 30 minutes.
3. Make sure the tank lid clicks when it closes, and if the lock is broken, the vacuum cleaner won't wash.

Add water to the mark MAX|Check the closing density of the tank cover|Wash the rough cleaning filter|Examine the tank for cracks-->

If you don't get water after this manipulation, move on to the next step, and pay special attention to the condition of the sealing gum on the tank lid: if it's deformed or covered with plaque, it needs to be replaced (article for Xiaomi Mi Mop 2T - MDY-007).

2. Clogged tubes and sprayer: how to clean the system

The most common reason for lack of water is a clog in the feed tubes or sprayer. In the Xiaomi Dreame and Viomi models, the channels are only 2-3 mm in diameter, and they are easily blocked:

• 🧵 Fibers of fabric (from a napkin or carpet).
• 🧂 Mineral deposits (if hard water is used)
• 🐭 Dust mixed with detergent (forms a thick plug).

Cleaning instructions:

1. Disconnect the water supply hose from the housing (usually it is attached to the bottom of the vacuum cleaner with a clip or screw).
2. Blow the tube with your mouth or compressor, and if the air is not flowing, it's a serious clog.
3. Rinse the system: Pour a warm solution of vinegar into the tank (1 cup of vinegar per 1 liter of water). Turn on the wash mode for 2-3 minutes, this will dissolve the lime deposits. Pour the solution and rinse with clean water 2-3 times.

Clean the sprayer.

Xiaomi STYJ02YM

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If the tube is heavily clogged, use a medical syringe (20 ml) with a needle: fill it with vinegar and rinse the channel under pressure. Do not use metal objects - they can damage silicone hoses!

After cleaning, check the tightness of the joints: if the tube is not tightly sitting on the connection, water will go past the sprayer. In the Dreame W10 and Bot W10 models, the silicone pipe often departs - it must be planted on an adhesive sealant (for example, LOCTITE 577).

3. Pump malfunction: how to check and what to do

If you have water in the tank, the tubes are clean, but the Xiaomi vacuum cleaner still doesn't clean -- the problem may be the water pump. In 95% of cases, it doesn't break completely, but it just loses performance because of:

• 🔋 Wear of the membrane (in vibration pumps).
• 🧲 Valve pollution (in centrifugal pumps).
• 🔌 Contact oxidation on the control board.

How to diagnose:

1. Remove the bottom cover of the vacuum cleaner (a T5 or T6 screwdriver is required).
2. Find the pump – it looks like a small cylinder with tubes (in Xiaomi Mi Mop P the pump is located to the right of the battery).
3. Unplug the hoses and apply the 5V-12V voltage (depending on the model) to the pump from the external power supply, if it does not buzz and pump water, it is defective.

If the pump is working but the water is not coming, check:

• 🔌 Contact state on board - oxidized tracks can be erased.
• 🔧 Wire integrity from board to pump (often rubbed against body).

⚠️ Warning: In Xiaomi Dreame W10 models, the pump is controlled via a MOSFET- transistor. If it burns, the vacuum cleaner will not wash, but it can vacuum properly. The transistor needs soldering skills of the SMD- components to replace it.

4 Electronics errors: codes and resetting settings

Sometimes, Xiaomi vacuum cleaners fail to supply water due to firmware failure or sensor errors, such as the DreameBot L10 Pro, which can be blocked by:

• 🤖 Humidity sensor errors (code E12).
• 📱 Communication failure between the main board and the water control module.
• 🔄 Incorrect settings in the Mi Home app.

Table of common errors and their values:

How to reset your settings:

1. Turn off the vacuum cleaner, press the power + home button for 10 seconds.
2. Connect to the vacuum cleaner via Mi Home, go to Settings → Reset to factory.
3. Update the firmware: Device profile → Software update.

Yeah, code. E10 or E12|Yeah, different code.|No, it just doesn't.|I don't know how to see it.-->

If the problem persists after reset, check the washing mode settings in the application. In some firmware (Xiaomi Mi Mop 2 Pro, version 3.5.8_0040), the water-locking bug is only fixed by flashing through ADB.

5. Problems with a napkin and a detergent module

Many users forget that the washing module (wet wipe + sprayer) also requires maintenance. If the Xiaomi vacuum cleaner "pretends" to wash (the pump buzzes, the indicators are on), but the floor remains dry, check:

• 🧼 The condition of the napkin - if it is clogged with dust, the water does not impregnate the fabric.
• 🕳️ Nozzle holes - they can be filled with pile or detergent.
• 🔗 Module fastening -- if it's shifted, water flows past the napkin.

Cleaning instructions:

1. Remove the washing module (in most models it is mounted on latches).
2. Wash the napkin in warm water with soap (don't use bleach!). For Dreame W10 models, washing in a typewriter at 30°C in delicate mode is suitable.
3. Clean the sprayer holes with a toothpick. In the Xiaomi STYTJ02YM, the sprayer is removable - it can be soaked in vinegar for 1 hour.
4. Check the spring-loaded napkin attachment mechanism, and if the spring is loose, the water will flow past.

⚠️ Warning: In Xiaomi vacuum cleaners with a OLED- display system (e.g. DreameBot X30), if the wipe is installed improperly, the error sensor E05 can be triggered. Make sure the fabric is flat and does not overlap the infrared sensor.

If the wipe is worn out (pouring, holes), replace it with the original (article for Mi Mop 2 - MDY-006). Analogues from AliExpress often have a different density of tissue and absorb water worse.

6 Mechanical breakdowns: what breaks most often

If all previous steps did not help, the problem may be mechanical failure, according to service centers, in the cleaning vacuum cleaners Xiaomi most often fail:

• 🔧 Drive mechanism of the napkin (in models with a vibration sink).
• 💧 Water supply valve (sticks in closed position).
• 🔋 Cleaning module control board (resistors burn out).

How to diagnose:

1. Wipe drive: Turn on wash mode and listen - if the motor buzzes but the napkin doesn't vibrate, the problem is gears or belt.
2. Valve: Take off the water supply tube and blow into it with your mouth. If the air does not pass, the valve sticks (you need to disassemble and clean).
3. The board: inspect it for blackened elements. In Xiaomi Mi Mop 2T, the R15 resistor (rated 10kΩ) often burns.

Cost of repair in the service:

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If the vacuum cleaner is warranty, do not disassemble it yourself! in the service centers of Xiaomi there is a free diagnosis - if you confirm a factory defect, repair will be free.

7 Prevention: How to avoid problems in the future

To clean the Xiaomi vacuum cleaner served longer without breakdowns, follow these rules:

• 💧 Use only distilled or filtered water—hard water clogs the tubes in 2-3 months.
• 🧴 Do not add detergents with abrasive particles (such as powders) - they scratch the pump.
• 🧹 After each cleaning, wash the rough cleaning filter and dry the napkin.
• 🔋 Once every 3 months, carry out preventive cleaning with acetic solution (see section 2).
• 📱 Update the firmware through Mi Home — in new versions fix bugs with lock washer.

For models with the function of auto-cleaning wipes (DreameBot W10) additionally:

• Once a month, clean the brush mechanism of wound hair.
• Check the water level in the dirty water tank – if it is full, the vacuum cleaner blocks the sink.

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Keep the vacuum cleaner in a dry place with a removed detergent module, which will prevent mold from appearing in the tubes and prolong the life of the napkin.

If you use a vacuum cleaner in deep wash mode (with high water consumption), reduce the intensity by 70% in the Mi Home settings, which will reduce the load on the pump and increase its life.

FAQ: Frequent questions about Xiaomi cleaners