Owners of Xiaomi appliances often face the need to maintain their devices, and the manual steamer Xiaomi Mijia is no exception. Over time, the device can accumulate scale, which reduces the efficiency of steam generation, or require replacement seals to eliminate leaks. Self-disassembly saves significant maintenance costs and extend the life of the device.
The dismantling process requires care, as the body is assembled on hidden screws and plastic latches. Any careless movement can damage the aesthetics or damage the leakage of the system. In this article, we will discuss in detail how to safely open the device, get to the heating element and carry out preventive work.
Before you get to work, it is important to understand that the internal layout of the Xiaomi Mijia is characterized by a high density of installation. The main difficulty is access to fasteners, which are often hidden under decorative plugs. To seal threaded joints in steam generators Xiaomi often uses a special heat-resistant sealant, rather than standard rubber gaskets.
Tool and workplace preparation
You can't disassemble the plastic properly without a properly selected toolkit, and using inappropriate items like kitchen knives or thick screwdrivers is guaranteed to damage the plastic, and you'll need a set of precision screwdrivers, including PH0 and PH00 cross-mounted screwdrivers, and a 2-3mm flat screwdriver.
Plastic latches are ideal for plastic blades or mediators; metal tools can leave deep scratches on glossy surfaces of the case when handled ineptly; and tweezers with curved ends are also prepared to extract small screws from hard-to-reach areas.
Organize the workplace so that all the parts are on hand and can not roll. It is recommended to use a magnetic mat or containers to sort the fasteners by dismantling stages, this will help to avoid a situation where after cleaning you will have “extra” screws.
- 🛠️ A set of precision screwdrivers (cross and flat)
- 🔧 Plastic blades for opening the body
- 🧲 Magnetic mat or organizer for screws
- 🔦 Lighting for internal components
⚠️ Warning: Before starting any work, be sure to disconnect the device from the power grid and wait for the heating element to completely cool down.
Dismantling the outer shell and searching for fasteners
The first step is to visually inspect the Xiaomi Mijia body. Manufacturers often hide screws under rubber linings or decorative plugs to keep the design sleek. Carefully examine the bottom of the handle and the area around the water tank - this is where the main fastener is most often hidden.
Carefully tuck the rubber cap at the bottom of the device with a thin needle or blade, and underneath it is usually a screw that holds the two halves of the body, and if there are no screws, then the body is held exclusively on plastic latches that require careful snapping around the perimeter of the seam.
Use a plastic blade as you swipe it along the junction of the halves of the body, and you hear the characteristic clicks, which are broken or the locks are released, and move slowly, without using excessive force, so as not to break the fragile plastic ears inside.
When you remove the main cover, you will see the internal control board and the top of the steam generator, and at this point it is important not to pull the halves of the body sharply, as they may be approached by wires from buttons or indicators, inspect the connections and, if necessary, carefully disconnect the plumes.
Disassembly of the steam generator and access to the pump
Inside the Xiaomi Mijia case, the main node is a metal block TEN, to which a pump is attached. The pump is responsible for supplying water from the tank to the heating element, and this is where pressure problems or leaks most often occur.
To access the pump, you need to unscrew the screws that fix the metal casing of the steam generator. Pay attention to the location of the hoses: they can be fixed with plastic clamps or simply tightly worn on the connections. Before removing the hoses, it is recommended to take a picture of their location so that when assembled, you do not confuse the intake and the outlet.
☑️ Check before disassembling the pump
The pump itself is usually a compact electric motor with impellers. It can be attached to rubber dampers to reduce vibration. When dismantled, check the condition of rubber seals at the joints - it is their wear that most often causes water to drip from the body during operation.
| Component | Materials | Type of attachment | Frequent malfunction |
|---|---|---|---|
| Corps | Heat-resistant plastic | Latches + screws | Overheating cracks |
| TAEN | Stainless steel | Threaded | Scale, break. |
| Pump | Plastic/Metal | Screws/landing | Wear of bushings |
| Hose. | silicone | Tightening/Homut | Fossilization of the lumen |
If you want to clean scale, you can remove the hoses and flush the system at this point, but if you want to replace the whole unit, keep unscrewing the base fasteners, and remember that the pump is equipped with electrical contacts that also need to be carefully disconnected.
Cleaning the system from scale and pollution
Scale is the main enemy of any vaporizer. Calcium and magnesium salts settle on the walls of the thermal power plant and inside the channels, narrowing the passageway for water and steam. In Xiaomi Mijia devices, the channels are thin enough, so even a small layer of sediment can critically reduce performance.
To effectively clean, use a solution of citric acid (20-30 grams per liter of water) or special means to remove scale. Pour the solution into the tank or directly into the system if the tank is removed, and leave for 30-60 minutes. The acid will dissolve solid deposits, after which they can be washed with water.
Can vinegar be used?
Mechanical cleaning is also important: use a soft brush or toothbrush to remove softened plaque from the surface of the thermal heater. Hard-to-reach areas can be blown with compressed air or washed under high water pressure. Make sure all channels are completely free.
- 🧼 Soak the parts in a solution of citric acid
- 🪥 Use a soft brush for mechanical cleaning
- 💨 Blow the channels with compressed air to remove moisture
- 👀 Check the passability of all holes in the lumen
⚠️ Warning: Never use abrasive powders or metal brushes to clean TENS. Damage to the protective layer will accelerate the formation of new scale and can lead to corrosion of the metal.
Diagnostics of the electrical part and the TEN
If the steamer stopped heating water or humming but not steaming, the problem may be in the electrician. To diagnose you need a multimeter. First of all, check the integrity of the heating element circuit. The resistance of a working thermal power plant with a power of about 1000-1500 watts should be about 30-50 Ohms.
Also check the thermostat or heat relay, which is often mounted directly on the TEG housing to protect against overheating. In cold conditions, the contacts should be closed (resistance close to zero). If the multimeter shows a cliff, the thermal fuse is burned and needs to be replaced.
Look closely at the control board. Look for signs of overheating, swollen capacitors or oxidized contacts. In Xiaomi Mijia steamers, the board is usually spray-proof, but with prolonged use, moisture can penetrate through the ventilation holes.
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When assembled, treat the threaded TEH connections with heat-resistant sealant, which will prevent the appearance of micro-vapor leaks, which over time can destroy the plastic case.
If the diagnosis shows a faulty TEN, replacing it is often economically impractical, since the cost of a new node can be 70-80% of the price of a new device.
Assembly of the device and checking leakage
The assembly is done in reverse order. Pay special attention to the installation of sealing rings and gaskets. If the old gaskets have lost elasticity or deformed, they must be replaced with new ones of the same size. Using temporary solutions, such as tape or conventional sealant, in steam generators is unacceptable.
When connecting the halves of the body, make sure that all the wires are stacked in their channels and not be clamped with plastic. Connect the parts of the body evenly, starting on one side and gradually snapping the locks around the perimeter. Don't tighten the screws too much so as not to damage the thread in the plastic seats.
The first thing you're going to do after assembly is to check for leaks without heating, put water in the tank, connect the device to the network, but don't turn on the steam button, visually inspect all joints and connections for droplets of water.
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The main criterion for successful repairs is the absence of leaks during the first cold start and a stable supply of steam during heating.
If the visual inspection does not reveal any leaks, turn the device into steam mode. Let it work for 2-3 minutes. At this time, the system will go into operation, and the pressure inside will increase. Re-examine the nodes. The absence of a whistle of steam and water droplets indicates a quality build.