Xiaomi Mi Air Purifier 3H air purifiers have become an integral part of the modern smart home, providing a fresh indoor atmosphere. However, owners often face a situation where after replacing the cartridge, the device continues to signal the need for maintenance. This is due to the fact that the system does not see automatic replacement confirmation and requires manual user intervention to zero the resource meter.
Ignoring the indicator can cause the air purification algorithms to malfunction, resetting the filter timer is necessary to ensure that the purifier correctly calculates the remaining life of the new consumable. Without this procedure, you will not be able to objectively track the real state of the air. HEPA-Elements that are critical to maintaining air quality.
In this guide, we will take a look at all the available methods for rebooting the meter, from touchbar control to fine-tuning in a mobile app. You will learn how to avoid common errors and what to do if standard methods do not work. Careful follow-up will help you quickly return the device to normal mode.
Signs of need to replace the cartridge
There are a number of indirect and direct ways to determine when to replace consumables, and first of all, you should pay attention to the color of the light ring located on the front of the device. When the resource comes to an end, the indicator begins to burn in orange, alerting the user to the urgent need for maintenance.
Xiaomi Mi Air Purifier also 3H fitted OLED-A display that shows the current percentage of resource remaining, and if you see a value close to zero or a flashing cartridge icon, that's a direct signal to action, and cleaning efficiency in that state can be significantly reduced, and noise levels can be increased.
Mi Home also sends push notifications to your smartphone, reminding you to buy a new filter, and ignoring these signals can cause the device to go into minimum performance mode or completely stop the fan to protect the engine from overload.
- 🔴 The light ring is lit in orange or red.
- 📉 The display displays 0% of the resource or flashes the filter icon.
- 📱 Notification from Mi Home app about low resource level.
- 🌬️ Increased noise level when working at medium speeds.
⚠️ Warning: Don't try to wash HEPA-water filter to extend the life of the material, which will cause permanent damage to the structure of the material and the device will fail.
Preparation for the installation of a new filter
Before you start software resetting the timer, you need to physically replace the old cartridge. To do this, open the back cover of the cleaner, turning it counterclockwise, and remove the spent element.
After removing the consumable from the package, it is recommended to give it a few minutes to "rest" the material straightened. insert a new cartridge into the case, observing the direction of airflow, which is usually indicated by the arrows on the end. Make sure that the element sits tightly in the socket and is not skewed.
Close the lid, turning it clockwise until the characteristic click. Now you can connect the device to the network. If the cleaner was connected to Wi-Fi, it can automatically update the status of the filter in the cloud, but in most cases, you need to manually activate the new resource.
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Before installing a new filter, take a photo. QR-code on its packaging - this will help you quickly find an article for re-purchase in the future.
Method 1: Reset through the touch panel
The fastest way to reset the meter is to use the built-in control interface on the device body. To do this, turn on the cleaner and wait for the system to boot. OLED-the display needs to find the filter icon, which is usually displayed at the bottom of the screen or appears when switching the display modes of information.
Press and hold the mode select button (or a special filter button if highlighted separately) for 3-5 seconds. The screen should blink to confirm the command is accepted. After that, the percentage of the resource should change by 100%, and the color indicator should turn green or blue, depending on the current air quality.
If the first time the action did not work, try to repeat the procedure by holding the button a little longer. Sometimes the system requires a clearer signal to enter the reset menu. Make sure you do not press the on button, as this may just turn off the device.
- ⏱️ Turn on the device and wait for the main screen to appear.
- 🖱️ Find the filter icon on the display or use the mode switch button.
- 🖐️ Press and hold the button during the 3-5 seconds.
- ✅ Wait for the indicator to change by 100%.
☑️ Pre-reset check
Method 2: Managing the Mi Home application
More flexible control is available through the official Mi Home app (or Xiaomi Home), a method that not only resets the timer, but also fine-tunes the type of filter installed, which affects the fan's operating algorithms. Open the app on your smartphone and go to your air purifier page.
In the upper right corner or in the optional settings menu (three dots), find the filter-related section, which will display the current status and the Reset or Replace Filter button, and click on it, you confirm the replacement, and the counter will update synchronously with the cloud server.
An important advantage of this method is the ability to choose a specific cartridge model. If you use an original filter or a quality analog with antibacterial coating, choosing the right type in the application optimizes the operation of the smart cleaning algorithm.
| Parameter | The original filter | Antibacterial | formaldehyde |
|---|---|---|---|
| Color of the case | Green. | Orange | Grey |
| Resource (watch) | 6000-12000 | 6000-12000 | 6000-12000 |
| Efficiency | Standard. | High against bacteria | Specialized |
What to do if the app does not see the cleaner?
Filter type setting for accurate operation
After resetting the meter, it is crucial to make sure that the system chooses the right type of cartridge installed. Xiaomi Mi Air Purifier 3H is able to work with various filter modifications, and this depends on the speed of the fan and the threshold of the automatic mode. Incorrect setting can lead to rapid contamination of the new element.
Go to the device settings in the app and look for the filter type, and you'll be asked to choose from a list of options available that match the color of your cartridge, usually a standard green, antibacterial orange or formaldehyde filter.
Choosing the right type affects the calculation of the remaining lifespan, for example, antibacterial filters may have slightly different recommendations for replacement depending on the operating conditions, correct calibration ensures maximum cleaning efficiency and prolongs the life of the motor.
- 🟢 Green is standard. HEPA-filter for everyday use.
- 🟠 Orange – version with antibacterial coating for families with children.
- ⚫ Gray – a specialized filter to combat formaldehyde.
⚠️ Note: If you choose the wrong filter type in the application, the device may not display the remaining resource correctly, showing 0% after a month of use.
Possible problems and solutions
Sometimes users are faced with a situation where the reset does not occur or the indicator continues to burn orange even after replacement. Often the reason lies in poor contact of the housing cover. The sensor that detects the closure of the rear panel may not work if the cover is not fully twisted or skewed.
Another common problem is that the device is time-dissynchronized, and if the cleaner hasn't connected to the Internet in a long time, its internal clock may be showing the wrong time, which can confuse the resource calculation algorithms. Try reconnecting the gadget to Wi-Fi and wait for synchronization.
In rare cases, you need to completely reset the device to factory settings, which requires you to simultaneously press the on button and the mode button for 5-7 seconds, this action will return all network settings and preferences to the original state, but will not affect the filter counter if it has already been reset.
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If the indicator is lit orange immediately after replacement, check the density of the lid and the presence of a protective film on the new filter.
Also, it is worth considering that some third-party filters do not have a chip or tag that the device recognizes. In such cases, the cleaner can continue to “think” that the old filter is worth, the solution here is only manual reset through prolonged button retention, described above.