The home air purification system requires regular maintenance, and owners of the popular Xiaomi Mi Air Purifier 3C often have to deal with the need to replace consumables. Unlike older versions, this model has a simplified design, but still requires care in maintenance. Correct and timely replacement of the element directly affects the quality of breathing and the efficiency of the device as a whole.
Ignoring replacement times can cause the device to go idle, just driving dust around the room, or even become a source of unpleasant odor. In this article, we will take a look at the entire process, from choosing the right cartridge to finally resetting the meter in the application, you will learn to do this quickly, without unnecessary movements and the risk of damaging the fragile latches of the case.
Before you start doing physical work, make sure you have new consumables on hand. Original components often have protective packaging that you will need to remove before installation. It is important not to start the process unless you are sure about your cleaner model, as filters from different generations may differ in size.
Choosing the Right Consumables
The first and most critical step is to purchase a suitable cartridge.The 3C model uses a specific form factor that differs from the Pro or 2S versions. There are many analogues on the market, but the original Xiaomi products guarantee the claimed efficiency of HEPA filtration and the presence of a carbon layer for absorbing odors.
When choosing, pay attention to the labeling. Usually on the package or the body itself, it is indicated compatibility with the 2H, 3H, 3C series. If you buy a filter too high from the older model, the lid simply will not close, and too low will lead to leakage of untreated air bypassing the barrier.
- 📦 Original: Guaranteed build quality and exact size matching.
- 💰 Analogues: Often cheaper, but may have a lower filler density.
- 🌿 Type of filtration: Make sure it is combined HEPA + (coal-fire).
⚠️ Warning: Do not try to wash or vacuum HEPA-Water destroys the structure of the fibers, and the vacuum cleaner can't pull the smallest dust out of the depths, which will turn the cleaner into a source of bacteria.
The lifespan is usually 6 to 12 months depending on the air pollution in your area. The app on your smartphone will tell you when the resource is coming to an end, but visual inspection will also be useful. If the white part has turned gray or brown, replacement is necessary immediately.
Preparation for replacement of the element
The preparation process takes only a few minutes, but it can not be ignored. You do not need any tools like screwdrivers or scissors, since the Xiaomi Mi Air Purifier 3C design is modular and disassembly is done manually, the main thing is to ensure a clean workplace.
Turn the device off. Although many people change the filter when the device is running, turning off the power will eliminate the risk of accidentally turning on the fan during the manipulation of the insides, this will also allow you to safely check the condition of the fan blades if the cover is removed.
☑️ Preparation for the procedure
The new filter is always packed in a sealed plastic bag, and it's designed to protect you from moisture and dust during storage, and you need to remove the packaging just before you install it, so that the pores of the material don't get clogged with dust from the air of your apartment while you're doing other things.
Removal of the old cover and removal
The design of the lower cover of the model 3C It's a rotary lock, and you have to get firmly in the bar at the bottom of the device and turn it counterclockwise. 45-60 degrees to a characteristic click or feeling of release of the fixers.
Once you turn, the lid is easily removed down. It's quite massive and heavy, so keep it steady so you don't drop it on the floor or on your foot. Inside, you'll see the end of an old filter. It can sit tight, especially if it's been standing for a long time.
To extract, grab a special pen tape that sticks out of the center or from the edge of the cartridge. Pull it up smoothly but surely. You don't have to pull sharply to avoid breaking the paper folds, even though the cartridge has already served its purpose. If the filter is stuck, you can sway it slightly from side to side.
What to do if the lid is not removed?
Installation of a new filter and assembly
Now the most critical thing is, take a new cartridge and make sure that the plastic shield film is completely removed, and if you leave the film, the device will overload, and the sensors will show an error because the air cannot pass through the polyethylene, and often users forget to remove the inner package, thinking that this is the safety net.
The orientation of the installation is important. There's a marking on the end of the filter that indicates the top and bottom, and the direction of the airflow. In the 3C, the filter is inserted with a handle up, and you put it carefully into the shaft of the device, making sure that it sits exactly in the center.
- 🔄 Turn: Make sure the projections on the filter match the slots in the body.
- 🔒 Fixing: The cover should close with a slight clockwise turn.
- 👂 Sound: When installed correctly, a clear click of the fixers is heard.
Take the bottom cover and put it on the body. You combine the locks with the slots on the main body. You turn the lid clockwise, you have to feel that it's in place and it's not rolling anymore. If the lid is hanging, you've not twisted it or you've misaligned the guides.
Resetting the timer and setting up in the application
After the physical replacement, you need to tell the device electronics that a new resource has been installed. If you don't, the indicator on the case will continue to burn in red or orange, and the application will show 0% of the resource.
Press and hold the on/mode button for 5-7 seconds. Usually, an audible beep will sound and the indicator will flash, confirming the reset of the counter. In some versions of the firmware, you need to press two buttons simultaneously, but for 3C, a long delay of the main button is often enough.
| Action. | Duration | The result |
|---|---|---|
| Short press. | 1 sec. | On/off |
| Double-push | 2 times | Change of regime (Car/Night/Favorite) |
| Long pressing | 5-7 seconds | Resetting of the filter indicator |
If you have a Wi-Fi connection set up, the status will also be updated in the Mi Home app. Go to your device card and you will see that the filter resource percentage has returned to 100% (or close to the value). If this does not happen, try disconnecting the device from the network for 10 seconds and turning it on again.
Typical errors and their solution
Even a simple procedure can go wrong if you make a number of common mistakes, one of the most common is to put the filter upside down, in which case the air will pass through the cartridge in the opposite direction, which will dramatically reduce the efficiency and can damage the structure of the layers.
Another problem is a loosely closed lid, in which case some of the dirty air will be sucked past the filter (short-circuit effect), and cleaning the room will become useless. The air quality sensor can show good results, but only because it measures the air inside the device, not in the room.
⚠️ Warning: If the indicator continues to burn red after replacement, check to see if the protective film is completely removed. Also make sure that the air pollution sensor (the hole in the back) is not clogged with dust - it can be cleaned gently with a cotton swab.
Sometimes users complain of a whistle or hum after replacement, which can be a sign that the filter is crooked and vibrating with the airflow, and try to remove it and re-insert it, making sure it fits tightly.
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Tip: Before you first install the new filter, slightly "unplug" it, gently pushing the folds with your fingers (without damaging them), which will increase the area of contact with the air and reduce the initial resistance to flow.
Frequently Asked Questions (FAQ)
Can I use a cleaner without a filter?
Why does the app show that the filter is 100% used, even though it is new?
How often do you need to change the filter?
Can the filter be extended by vacuuming it?
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Regularly changing the filter is not just a recommendation, but a prerequisite for maintaining the health of your respiratory system and the durability of the Xiaomi device itself.