How to service Xiaomi air humidifier: a complete guide with photos and tips

Xiaomi’s humidifiers are among the most popular devices in the brand’s smart home lineup, combining affordable price, modern design and integration with the Mi Home ecosystem. However, even the most reliable device requires regular maintenance, from proper water refilling to deep cleaning of scale and bacteria. Without proper maintenance, the humidifier will not only lose efficiency, but can also become a source of unpleasant odor or even mold.

In this article, we will discuss how to service Xiaomi humidifiers (including Smartmi Air Humidifier models). 2/3, Mi Air Humidifier Pro and others to ensure they operate as long and safely as possible:

• 🔹 How often and how to refuel the device to avoid breakdowns;
• 🔹 Step-by-step instructions for cleaning scale, mold and bacteria;
• 🔹 What consumables (filters, cartridges) are suitable for different models;
• 🔹 Common Mistakes That Shorten the Life of a Moisturizer.

All recommendations are based on official Xiaomi guides and user experience, so they are suitable for both budget and premium models. If you are just planning to buy, at the end of the article there are tips for choosing a humidifier for your needs.

1.What water can be poured into the Xiaomi humidifier

Water quality is directly related to how often you have to clean your device and change your consumables. Xiaomi, in the instructions for most models (such as Smartmi Air Humidifier 3), indicates that distilled or demineralized water is the best option. But in practice, not all users follow this rule, let's see what alternatives are and what they threaten.

Here’s what happens when you use different types of water:

If you do use filtered water, be sure to drain the residues from the tank after each cycle and flush the tank. In ultrasonic spray models (such as the Mi Air Humidifier Pro), scale settles on the membrane, resulting in reduced performance and noise.

⚠️ Note: Xiaomi Smartmi Air Humidifier 2 and later has water hardness sensors. When using tap water, the device can automatically shut down with an error. E1 (high-mineralization).

Where to get distilled water cheaper:

• 💧 In auto shops (costs 50-100 rubles. for 5 l);
• 💧 In pharmacies (packing 1-2 l, suitable for small humidifiers);
• 💧 Order with delivery (services such as Yandex Store or SberMarket).

2. How to properly fill the humidifier: step-by-step instructions

What would seem to go wrong with pouring water? But even here, there are nuances that affect the operation of the device. For example, in models with a hygrostat (humidity sensor), improper refueling can lead to failures in measurements.

Follow this algorithm:

Turn off the device from the socket and wait for the complete cooling (if it worked)

Remove the top cover and remove the water tank

Wash the tank with running water (if there were residues of old water).

Pour water to the mark MAX, without exceeding it

Set the tank in place, making sure it fits tightly to the base

Connect the humidifier to the network and turn it on through the application or button on the case-->

Important points:

• 🚫 Do not pour water above the mark MAX — This can cause leaks and sensors to break, and in Smartmi Air Humidifier 3 overflows, the protection is triggered and the device is locked.
• 🔄 Change the water daily, even if the humidifier is not working. Stagnant water is the perfect environment for bacteria to multiply.
• 🌡️ If you use warm water (for example, to accelerate spraying), its temperature should not exceed 40.°C. Hot water deforms plastic.

In humidifiers with flavoring function (for example, Mi Air Humidifier Pro) there is a separate compartment for essential oils. Never add oil directly to the water, it will clog the membrane and lead to breakage. Use only original Xiaomi cartridges or certified analogues.

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If the humidifier starts to make noise or spray water unevenly, check the water level. Sometimes the sensor mistakenly shows a full tank, although there is little water. Try tilting the device slightly - if the spray sound normalizes, then you need to add water.

3. Cleaning the Xiaomi moisturiser: remove scale, mold and bacteria

Regular cleaning is a guarantee of long-term service of the humidifier, the manufacturer recommends surface cleaning every 3-5 days, and deep cleaning every 1-2 weeks (depending on the hardness of the water), neglecting this rule leads to:

• 🦠 The appearance of black mold on the walls of the tank;
• 🧂 Scaling on the ultrasonic membrane (reduces productivity by 30-50%);
• 🤧 Spraying bacteria into the air (may cause allergies or respiratory diseases).

For cleaning, you will need:

• 🧽 Soft sponge or brush;
• 🧂 Citric acid or vinegar (to remove scale);
• 🧴 A means for washing dishes (without abrasives!);
• 🧻 Microfiber wipe.

Step-by-step instructions for deep cleaning:

1. Disconnect the humidifier from the network and drain the remaining water.
2. Remove the tank and rinse it with warm water and soap. For hard-to-reach areas, use a brush.
3. Prepare the solution: 2 tbsp. l. of citric acid per 1 liter of water. Pour it into the tank and leave it for 30-60 minutes (to remove scale).
4. Clean the ultrasonic membrane (bottom of the device) with a cotton swab dipped in the same solution.Do not use metal objects - the membrane is easily damaged!
5. Wash all the parts with running water and dry in air (do not use a hair dryer or battery!).
6. Collect a humidifier and fill with fresh water.

For models with antibacterial coating (for example, Smartmi Air Humidifier 3), aggressive detergents can not be used - they destroy the protective layer.

⚠️ Warning: If the humidifier starts to make a hissing sound after cleaning or stops spraying water, the ultrasonic membrane is likely damaged. In this case, a replacement module is required (contact the Xiaomi service center).

4. Replacement of filters and cartridges: what consumables are needed and how to change them

Xiaomi humidifiers use different types of filters depending on the model:

• 🔄 Coal filters – remove impurities and unpleasant odors (available in Mi Air Humidifier Pro);
• 🧂 Emollient cartridges – reduce water hardness (e.g. Smartmi Air Humidifier 3);
• 🌿 Antibacterial filters – prevent the reproduction of microbes.

The service life of consumables is specified in the instructions, but in practice it depends on the quality of water:

How to replace the filter:

1. Turn off the humidifier and drain the water.
2. Remove the old filter (usually located at the bottom of the tank or under the lid).
3. Wash the filter compartment with warm water.
4. Install a new filter, making sure it fits tightly.
5. Fill the device with water and turn it on.

The original Xiaomi consumables can be purchased:

• 🛒 In the official Mi Store;
• 🛒 On AliExpress (see article, for example, FBJ01ZM Smartmi Air Humidifier 2 filter);
• 🛒 In the stores of equipment (for example, M. Video, Messenger).

⚠️ Note: Use of non-original filters may result in denial of warranty service, especially for models with water quality sensors (such as Smartmi Air Humidifier 3), which recognize counterfeits.

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Saving on filters is unprofitable: the cost of replacing the membrane or electronics in case of failure due to bad water is 3-5 times higher than the price of the original cartridge.

5. Typical malfunctions and how to fix them yourself

Even with proper care, Xiaomi humidifiers can break down, and here are the most common problems and ways to solve them:

Problem 1: The humidifier is not switched on

• 🔌 Check the power outlet and cable (try another device).
• 💧 Make sure there is water in the tank (some models are blocked when the tank is empty).
• 🔄 Reset the settings: press the power button for 10 seconds.
• 📱 If you are running Mi Home, reconnect your device to Wi-Fi.

Problem 2: The device works but does not spray water

• 🧂 Check the membrane for scale (clean citric acid).
• 💧 Make sure water doesn't get into the vents (turn the device over and shake it).
• 🔄 If a humidifier with a hygrostat, reset the humidity settings in the app.

Problem 3: There is an unpleasant smell

• 🦠 Urgently wash the tank with vinegar solution (1: 1) and dry.
• 🧼 Replace water with distilled water and add 1-2 drops of hydrogen peroxide.
• 🌿 Check the filter – if it is old, replace it.

Problem 4: The humidifier makes a lot of noise

• 🔊 Check if the tank is touching the body (sometimes the vibration is increased due to the loose fit).
• 🧂 Clean the membrane of scale.
• 🔄 If the noise appeared after the fall, it is possible that the fan is damaged (repair is required).

If none of these methods worked, check the error codes on the display (if any).

• E1 — high-mineralization;
• E2 — spillage;
• E3 — humidity-sensing.

To reset errors in most models, just press the power button for 5-10 seconds. If the error occurs again, contact the service.

6. How to extend the life of Xiaomi humidifier

The average life of Xiaomi humidifiers is 3-5 years, but with proper care, it can last longer.

• 🌡️ Do not put the device near the battery or heaters - this accelerates evaporation and scale formation.
• 🚫 Do not move the humidifier while working - it can damage the membrane.
• 🔄 Regularly update the firmware through the Mi Home app – this corrects errors in the operation of sensors.
• 📱 Set up a schedule in the application so that the device does not work around the clock (optimally 8-10 hours a day).
• 🛠️ Check the sealing gums on the tank once a month – if they crack, replace them (you can order on AliExpress).

If you are away for a long time (for example, on vacation), completely dry the humidifier before storing:

1. Pour the water and flush the tank.
2. Wipe all the details with a dry napkin.
3. Remove the filter and store it separately in the bag.
4. Put the device in a box in a dry place (not on the balcony!).

For models with hygrostats (for example, Smartmi Air Humidifier 3), it is useful to calibrate the sensor every six months.

1. Place the humidifier in a room with normal humidity (40–60%).
2. In the Mi Home app, reset the sensor settings (Settings) → Resetting calibration).
3. Let the device work for 1-2 hours to automatically adjust.

7. Xiaomi model comparison: which humidifier is easier to maintain

If you haven't bought a humidifier yet, note the differences in service between different models, and we compared popular devices by key parameters:

For those who don't want to mess around with the cleaning, the best choice is Smartmi Air Humidifier 3.

• 🔹 Antibacterial coating of the tank;
• 🔹 Automatic scale protection;
• 🔹 Easy access to the filter.

If you need a humidifier with flavoring, look out for the Mi Air Humidifier Pro, but be prepared for more thorough care.

FAQ: Frequent questions about maintenance of Xiaomi humidifiers