The Xiaomi Smartmi Humidifier 2 (also known as Smartmi Evaporative Humidifier 2) is a popular device to maintain an optimal indoor climate. Over time, even the most reliable equipment requires maintenance: scaling, filter replacement or minor repairs. However, the manufacturer rarely provides official disassembly instructions for fear of unqualified interventions. This article will help to safely disassemble the humidifier without risking electronics or the case, and will also tell you what tools and materials will be needed for the procedure.
Many users face problems: the device starts to make noise, does not spray water well or refuses to turn on at all. In 80% of cases, the cause is contamination of the internal components - the membrane, fan or sensors. Disassembly allows you not only to clean the humidifier, but also to diagnose malfunctions, such as oxidation of contacts or wear of the O-rings. It is important to understand that improper actions can lead to the loss of warranty (if it is still valid) or the device fails. So before you start, carefully study this manual and prepare everything you need.
In the article you will find:
- 🔧 Step-by-step algorithm for disassembling photos of key stages
- ⚠️ List of Common Mistakes and How to Avoid Them
- 🛠️ Recommendations on instruments and consumables
- 🔄 Tips for reverse assembly and testing
Preparation for disassembly: tools and materials
Before you start disassembling the Xiaomi Smartmi Humidifier 2, make sure you have everything you need. Lack of the right tools can damage plastic latches or threaded connections. Here is the minimum set you'll need:
- 🔨 Plastic blades (2-3 pieces) - for dissociating the body without scratches
- ⚙️ Cross screwdriver (PH0 or PH1) — screw-holder
- 🧴 Isopropyl alcohol 90%+ — Cleaning contacts and sensors
- 🧽 Soft brush (dental or brush) – to remove dust from the fan
- 📦 Containers for screws - so as not to lose small details
In addition, the following may be useful:
- 🔍 Loop - to inspect small parts (for example, chips on the board)
- 📏 Caliber or ruler - to check gaps during assembly
- 🧲 Magnetic mat - to fix screws and not lose them
If you plan to clean an ultrasonic membrane, prepare acetic acid (5-9%) or a special scale removal tool (such as Antinakipin). Do not use abrasive materials or metal brushes - they will damage the membrane coating!
⚠️ Warning: Before disassembling, be sure to disconnect the humidifier from the mains and drain all water from the tank.Residual moisture on the contacts can cause a short circuit when turned on!
Xiaomi Smartmi Humidifier 2 Device
To properly disassemble a humidifier, you need to understand its internal structure. Smartmi Humidifier 2 consists of several key modules:
- The top cover is a removable panel with control buttons and indicators.
- Water tank - a capacity of 4.5 liters with a float level sensor.
- Base with electronics - contains a control board, fan, ultrasonic membrane and pump.
- The lower part is a case with a filter compartment and a power connector.
Below is a simplified layout of the main components:
| Component | Location. | Function |
|---|---|---|
| Management fee | Under the top cover, right | Control modes, communication with the Mi Home app |
| Ultrasonic membrane | Base center, under the tank | Steam generation |
| Fan | Back of the base | Distribution of steam by room |
| Float sensor | Inside the tank | Control of water level |
| Filter | Under the removable lid. | Cleaning water from impurities |
So, when you disassemble, you pay special attention to the connection loops, which are often attached with fragile latches, for example, the plume between the board and the control buttons is easily damaged if you pull it by the wires instead of the connector.
Where is the serial number of the device?
Step-by-step disassembly instruction
Now, let's get to the practice, it's easier to disassemble the humidifier on a table with good lighting, and follow the instructions in strict order so you don't miss important details.
Step 1: Remove the top cover
1. Turn the humidifier upside down and place it on a soft cloth (so as not to scratch the body).
2. Press the two latches on the sides of the top cover (they are closer to the front panel). Use a plastic blade to gently fit the cover:
↓ Click here
[______ROOK ______]
↓ And here.3. After clicking, pull the lid on you and up. It will be removed along with the control buttons.
Step 2: Disconnecting the water tank
1. Turn the device to its normal position and remove the tank by pulling it vertically upwards.
2 Under the tank you will see a sealing ring - carefully remove it and wash it under warm water (if it is contaminated).
3. Inside the base, you can now have an ultrasonic membrane and some electronics. Don't touch the membrane with your hands, because the fat from the skin shortens its lifespan!
Step 3: Disassembling the Foundation
1. Turn the base and unscrew 4 screws (they can be hidden under rubber legs - slid them with a spatula).
2. Carefully separate the two halves of the body, starting at the rear (where the fan is located).
- 🔌 Microchip control board ESP8266 (responsible for Wi-Fi)
- 💨 Fan with blades (may be dusty)
- 💧 Pump and tubes for supplying water to the membrane
3. disconnect the plumes from the board (they are fastened by connectors with latches - lift them up before extraction).
Photograph the location of the plumes|Mark the screws (they may differ in length)|Check the integrity of the sealing ring|Prepare a container with vinegar for soaking-->
Step 4: Extract the ultrasonic membrane
The membrane is the most delicate element of the humidifier, so you can remove it.
1 Unscrew 2 screws that fix the metal plate above the membrane.
2. Carefully place the membrane around the edges (it is glued to the base with silicone sealant).
3. Place the membrane in a solution of vinegar (1:1 with water) for 15-20 minutes to remove scale.
⚠️ Note: If the membrane has visible cracks or does not emit a characteristic "squeak" when working, it must be replaced: ZNMS07LM).
Cleaning and diagnostics of components
Once dismantled, we can start to deep-clean and test the parts, starting with the most problematic parts.
1. Ultrasonic membrane
This is the heart of the humidifier, signs of malfunction.
- 🔊 There is no ultrasonic noise when switched on
- 💦 Weak pairs or their complete absence
- ⚡ The white coating (scaling)
For cleaning:
- Soak the membrane in a vinegar solution (as described above).
- Remove the plaque from the surface only with a soft brush (do not rub the back side!).
- Wash with distilled water and dry in air (do not use a hair dryer!).
Fan and ducts
Dust fans are a common cause of noise and performance loss.
- 🧹 Remove dust from the blades with a soft brush.
- 💨 Blow the ducts with compressed air (for example, a canister to clean the keyboard).
- 🔧 Check the fan bearing: if it is a luftite or creaking, a replacement will be required.
3. Management fees
The humidifier's electronics rarely fail, but they can become contaminated or oxidized.
- 🔥 Darkened areas (a sign of overheating)
- 💧 Oxidized contacts (green coating)
- 🕳️ Cracks on the tracks
Use isopropyl alcohol and cotton swabs to clean it. Do not use acetone or other solvents!
💡
If the humidifier does not turn on after cleaning, check the fuse on the board (usually located next to the power connector), it can be replaced with a similar one with the same nominal value (usually the same value). 250V/2A).
Common Mistakes in Disassembly and How to Avoid Them
Even experienced users sometimes make mistakes that lead to breakdowns, and here are the most common ones and ways to prevent them:
| Mistake. | Effects of consequences | How to avoid |
|---|---|---|
| Using metal tools to remove the cover | Scratches on the body, chipped plastic | Use only plastic blades |
| Strong pressing of the ultrasonic membrane | Cracks, loss of performance | Remove the membrane carefully, without pressure |
| Confused screws during assembly | Flawed fit of details, vibrations | Mark screws (for example, stickers) |
| Cleaning the membrane with abrasive means | Damage to coating, deterioration of spraying | Use only vinegar or special products |
Another common problem is damage to the plumes, for example, the plume of the display can come off if you pull the lid too sharply. Always check if the connectors are disconnected before disassembling!
If the humidifier does not turn on or does not work correctly after assembly, go back to the step with photographing the connectors - you may have confused the polarity or not fully inserted the plume.
💡
The most vulnerable part of disassembly is the ultrasonic membrane, which costs about as much as one. ~30% of the price of a new humidifier, so treat it as carefully as possible.
Assembly and testing after disassembly
The humidifier assembly is in reverse order, but there are several nuances that will help to avoid problems:
- The tank seal ring should lie flat, without torsion, and grease it with silicone lubricant for better leakage.
- Connect the plumes to fix the screws - so it is easier to correct their position.
- Screw the screws cross-cross to avoid skewing the body.
After assembly, perform the test:
- Pour the water and check if there are any leaks in the joints.
- Turn on the humidifier and make sure the fan rotates smoothly (without creaking).
- Check the work through the Mi Home app – if all sensors display data correctly.
If the humidifier does not spray water, but the fan is working:
- 🔄 Check if the membrane is properly installed.
- 💧 Make sure the float sensor is not stuck in the upper position.
- ⚡ Check the voltage on the contacts of the membrane with a multimeter (should be) ~24V).
When the disassembly did not help: alternative solutions
If the problems are still there after cleaning and assembly, the malfunction may be more serious than it seemed.
- 🔌 Utilizer not turned on: Check the power supply (voltage at the output should be) 24V DC). Check the board for burnt elements (blackened resistors, swollen capacitors).
- 💨 Weak steam at maximum settings: Replace the filter (even if it looks clean - resource) ~3-6 months) Check the pump for blockages (may require flushing or replacement).
- 📱 Unconnected to Wi-Fi: Reset the humidifier settings (hold the 10 seconds switch on) Update the firmware via Mi Home (if the device reacts at all).
If the diagnostics show that you need to replace components, order them only from official suppliers.
- 🛒 Ultrasonic membrane - article ZNMS07LM.
- 🛒 The filter is the original Smartmi PM-F01 (or compatible).
- 🛒 Power supply — 24V 1.5A (check the polarity of the connector!).
The cost of repairs in the service center can reach 50-70% of the price of a new humidifier, so consider what is more profitable - to repair or buy a new model.