Checking Xiaomi robot vacuum cleaner before buying in the store

Buying smart equipment from an offline store is always a balance between wanting to pick up the product immediately and the risk of getting a defective one. Unlike online orders, where returns often take days, checking the device "here and now" avoids many problems in the future, especially in the category of robot vacuum cleaners, where the battery status and integrity of wheel mechanisms cannot be assessed through packaging.

Many buyers mistakenly assume that if the box is sealed and looks whole, everything is fine inside. However, the return statistics show that up to 15% of devices have hidden defects or usage marks that can only be detected with detailed inspection. In this article, we will discuss a step-by-step algorithm of actions that will help you make sure that you pay for a new Xiaomi Vacuum, not for a showcase sample or a restored gadget.

Don't be shy about asking your consultant to open the box, which is your legal right as a consumer, guaranteed by the laws on consumer protection. 10-15 It's a little bit short of minutes, but it'll save you hours of contact with the service center.

Visual inspection of the box and the factory seal

The first thing you encounter in a store is a packaging box, and the cardboard containers should be dense, with no traces of claws, dents, or, worst of all, traces of moisture, and if the box looks like it's been opened or dropped, that's the first signal for a more thorough check of the contents.

Pay special attention to factory seals. In the original Xiaomi appliances and sub-brands like Roborock or Mijia, they are usually located on the ends of the box. The seal should be single, without any trace of gluing or dryer heating. If you see that the tape is pasted over the factory stickers or the seal is cut with a knife, politely ask to replace the product with another.

⚠️ Note: If there are traces of re-sticking with regular stationery tape on the box and the factory seals are broken, it may have already been opened, it may be a showcase sample or a defective product that the previous customer returned to the store.

Also check the conformity of the markings on the box and stickers.Serial number (S/N) and IMEI (if the model supports SIM-The number discrepancy is a sure sign that the components or the base itself may have been replaced.

Compilation and condition of accessories

When you open the box, don't rush to turn on the device. First, check the equipment. All items must be in their compartments, packed in individual bags or fixed with foam. The absence of even small parts, such as a side brush or power cable, indicates inattention when packaging or using.

Carefully inspect the charging station. The plastic case of the base should not be scratched, scuffed or finger marks. The cable connectors should be clean, oxidized. The power cable should be neatly twisted and secured with a screed, not wound randomly.

• 🔌 Charging station: make sure the legs don’t slide or be erased and the contacts on the top panel are clean.
• 🧹 Brushes: The main and side brushes should be new, without the villi of dust or hair on the villi.
• 💧 Water container: If the model supports wet cleaning, make sure there are no traces of water or lime plaque inside.
• 📄 Documentation: availability of a warranty card with the stamp of the store and instructions in an understandable language.

The dust container should be kept clean, even if it has a small amount of dust or debris, it is 100% a sign that the device has been used, so demand a replacement because you are buying a new product, not a used one.

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And you can see HEPA filters, if they're grayish or dusty, they're definitely used, and the new filter is always white or light blue, and it only smells like new plastic.

Checking the appearance of the body and wheels

The robot vacuum cleaner itself is a complex mechanism that is sensitive to impact. Take the device in your hands and carefully examine the top cover. On the glossy surfaces of Mijia or Roborock, you can immediately see micro scratches. Matte plastic housings can hide the scuffs, so swipe your finger over the surface.

Pay special attention to the bottom of the device, where the wheels and the turbobrush are located. Turn the robot over and inspect the wheel modules. Rubber on the wheels should be clean, without black traces of friction against the floor. If you see that the rubber is already "trenched" or has bald spots, then you have been actively vacuuming.

Check the mobility of all mechanical parts. The wheels should rotate freely, without creaking or jamming, the side brush should also be easy to scrolle, if the wheel gets stuck or rotates with difficulty, it may have already been hit by sand or the mechanism is damaged.

⚠️ Warning: Never turn over the vacuum cleaner on! This can cause the gyroscope or sensors to break. All mechanical checks on the bottom panel are done only on the device that is turned off.

Look at the sensors around the bumper perimeter and the lidar turret (if any), the sensor lenses must be crystal clear, without fingerprints, and the mud on the sensors is a sign that the device has not only been turned on, but may have been used.

Battery diagnostics and charging

One of the most important things is to test the battery, because lithium-ion batteries are sensitive to storage conditions, and if the device was in storage for a long time in cold temperatures or in the sun, the battery capacity could degrade.

Connect the robot to the charging station. The charging indicator should light up immediately. Pay attention to the color of the indicator: usually orange or flashing white means the charging process, and permanent white means full charge. If the indicator does not light up, try replacing the socket or cable.

If the seller has the ability and demo mode, run a short cleaning. The robot must drive a few meters and return to base. If the device is discharged in 2-3 minutes of operation, the battery is defective or has a deep discharge, which is critical for its life.

Testing of engine and sensors

Turn on the device and listen to the sound of the work. The motor should work smoothly, without foreign whistles, knocks or vibrations. The suction turbine makes a characteristic hum, but it should not be interrupted. Any extraneous sounds may indicate an imbalance of the fan or hit a foreign object.

Check the sensors. Put your hand up to the drop sensor (usually located at the bottom of the perimeter) — the robot has to respond by stopping or changing its trajectory. The bumper obstacle sensor also has to be sensitive: when you press it lightly, the robot has to move back.

If the model is equipped with a laser rangefinder (LDS), start building the map. The laser module should rotate smoothly, without cracking. If you hear a grinding or beating as the "turret" rotates, the mechanism will soon fail.

⚠️ Warning: Loud whistles at maximum power may be the norm for some models, but if the whistle is accompanied by body vibration, it is a sign of a defect in the engine bearing.

Also check the control button. It should be a clear stroke and should not be triggered. The vibrore (if any) should feel with your finger. All these little things form an overall impression of the quality of the assembly of a particular instance.

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The smooth sound of the engine and the absence of vibration of the body when working at maximum power are the main signs of a serviceable engine and high-quality assembly.

Checking the connection to the application and Wi-Fi

Modern robot vacuum is useless without a smartphone. The store often has poor Wi-Fi, but it's worth trying to connect the device. Download the Mijia or Xiaomi Home app and try adding the device.

The pairing process will show if the Wi-Fi module is working inside the robot. If the phone sees the device but can't connect, it can be a problem with the store network. However, if the robot isn't detected in search mode at all, the wireless module may be faulty.

Connection sequence:


1. Robot on.




2. Press the buttons "Home" and "Enable" at the same time for 3-5 seconds.




3. wait for a voice message about the interface mode.




4. Select the device in the application.

Notice the firmware version that will show up in the app, if the version is very old, you'll have to spend time updating it right after you buy it, and sometimes there are demo units with modified software that block some features.

Frequently Asked Questions (FAQ)