The Xiaomi Air Purifier 3H has become one of the most popular devices for keeping air clean in apartments and offices. Its compact design, high performance (CADR up to 380 m3 / h), and integration with the Mi Home ecosystem make the model popular even years after its release. However, many users face the problem: after replacing the filter, the device continues to show the expired resource and requires a meter reset. Without this procedure, the cleaner can work incorrectly – for example, increase fan speed for no reason or block certain functions.
In this article, we will discuss all the current ways to zero the filter in Xiaomi 3H, including official methods through the Mi Home app, manual button combinations, as well as alternative solutions for cases where standard instructions do not work. We will pay special attention to the typical errors that users make, and give recommendations for extending the life of the filters. If you just bought a new filter or plan to replace it, save this article to bookmark so as not to search for information at the last minute.
Why you need to reset the filter counter in Xiaomi 3H
The filter life meter in the air purifier is not just an indicator, it affects:
- 🔄 Automatic mode: The device focuses on the remaining filter resource to adjust the fan speed. If the meter is not reset, the cleaner can operate at higher speeds, consuming electricity and creating unnecessary noise.
- ⚠️ In-app notifications: Mi Home will constantly send you filter replacement alerts, even if you have already changed the filter.
- 🛑 Blocking functions: in some firmwares at 0% of the filter resource, the ability to manually control the fan speed is turned off.
- 📊 Usage statistics: Incorrect data distorts the in-app air quality analytics, making it difficult to track the actual cleaning efficiency.
The manufacturer claims that the original Xiaomi 3H filter is designed to last 6-12 months (depending on the intensity of use and air pollution), but the meter in the device is not reset automatically after replacement, but only manually – this is done so that the user consciously confirms the installation of the new filter. If you ignore the reset, the cleaner will “think” that the filter is still exhausted.
⚠️ Warning: Don't confuse resetting the filter counter with a full reset of the cleaner settings. The latter erases all user settings, including the Mi Home account binding and data history. Resetting the filter is a separate procedure that does not affect other parameters.
Official method: reset via the Mi Home app
The most reliable and recommended method by the manufacturer is to use the proprietary Mi Home app (or Xiaomi Home in new versions), which works on all Xiaomi 3H firmware, including the latest updates in 2026.
- Open the Mi Home app and make sure the air purifier is connected to the same Wi-Fi network as your smartphone.
- Go to the home page of the device (Xiaomi Air Purifier 3H).
- Slap the icon. ⚙️ «Settings** (cog in upper right corner).
- Select Reset filter counter (or Filter Reset in English version).
- Confirm the action in the window that appears, the counter will zero, and the filter resource indicator will reset to 100%.
If your application does not have a Reset filter counter, check:
- 📱 App Version: Update Mi Home to the latest version in Google Play or App Store.
- 🌐 Account Region: Some features may not be available if your account is linked to Chinese servers. Try changing region to Russia or Europe in your profile settings.
- 🔄 Cleaner firmware: If the device hasn't been updated in a long time, some options may not be available. Check for updates in the Firmware Update section.
Update the Mi Home app to the latest version
Connect your cleaner and smartphone to the same Wi-Fi network
Make sure the filter is physically replaced with a new one.
Check the region of the account (should match the region of the device)-->
If the meter is not up again after resetting, try rebooting the cleaner: disconnect it from the network for 10 seconds, then turn it back on, and 90% of the time, that solves the problem.
Alternative method: reset buttons on the body
You can't always use an app -- for example, if the cleaner isn't connected to Wi-Fi or if the Mi Home isn't running smoothly -- in such cases, you can reset the filter counter from the control panel on the Xiaomi 3H body. This works on all firmware versions, but requires precise steps.
Instructions:
- Put the air purifier on the grid.
- Press and hold the Mode button (with the moon/sun icon) for 5-7 seconds until the indicator starts flashing.
- Without releasing the Mode button, press the On/Off button once.
- Release both buttons. The filter indicator should light up green (100% of the resource).
If the combination didn’t work the first time, repeat the steps by holding the Mode button a little longer (up to 10 seconds).
1. Press and hold the "On./Off" button. 3 seconds.
2. Without letting go, press the Mode button 1 time.
3 Release both buttons in 5 seconds.⚠️ Note: On devices with firmware version 2.1.5 and later (released after 2022), the button combination may not work. In this case, use a reset via Mi Home or update the firmware to the latest version.
What to do if the buttons do not respond?
Resetting to factory settings: when it is needed
If none of the above methods worked, you may need a full reset, which will return the cleaner to the box-like state, including resetting the filter counter.
- 🔗 You will need to reconnect the device to the Mi Home.
- ⚙️ All user settings (timers, modes, sensor sensitivity) will be lost.
- 📱 Data history in the app will be reset.
How to make a hard reset:
- Disconnect the cleaner from the network.
- Press and hold the button on/off.
- Without releasing the button, connect the device to the outlet.
- Keep holding the button for 10-15 seconds until the lights start flashing quickly.
- Release the button - the cleaner will restart and return to the factory settings.
After reset, connect the device to Mi Home again and reset the filter counter through the application (as described in the first section).
| Resetting method | Advantages | Deficiencies | Suitable for firmware |
|---|---|---|---|
| Through Mi Home. | Quickly, safely, does not require manipulation of the device | You need to connect to Wi-Fi, sometimes bugs in the application | All versions. |
| Button combination | It works without the Internet, does not reset other settings | Does not work on new firmware, requires accuracy | Up to 2.1.4 |
| Hard reset | Guaranteed resets the counter, solves most software errors | Remove all settings, requires re-binding | All versions. |
Common Mistakes and How to Avoid Them
Many users experience problems when resetting the filter due to the inconspicuous nuances, and here are the most common errors and ways to solve them:
- 🔌 Cleaner doesn't respond to buttons: check that the device is plugged in and the power indicator is on. If the indicator flashes red, the power supply may be faulty.
- 📶 Mi Home Reset: Make sure your smartphone and cleaner are on the same Wi-Fi network (not via the same Wi-Fi network) VPN Or mobile Internet. Try reconnecting the device in the app.
Critical error: If the filter is replaced and the cleaner produces an E1 or E2 error, it means that the air quality sensor or the control unit is in trouble, and then the resetting of the meter will not help, and a diagnostic service center is required.
1. the density of the fitting of the filter - there should be no gaps between it and the housing.
2. condition of the sealing gum (when worn, it must be replaced).
3. firmware version - in older versions there was a bug with a false alarm of the wear sensor.-->
How to prolong the life of the filter: tips for care
Resetting the meter is good, but it's even better to delay the time of filter replacement as much as possible. Here are some proven ways to extend the meter's life:
- 🌬️ Regular cleaning of the prefilter: it can be washed under running water (without detergents!) every 2-3 weeks. HEPA-filter.
- 🚫 Use in clean rooms: Do not place a cleaner near dust sources (building materials, animal wool, cooker stove).
- ⏱️ Optimal operating mode: Use Automotive or Sleep Mode (at night) to reduce filter wear.
- 🌡️ Humidity control: at humidity above 60%, the filter may be covered with mold. Use a dehumidifier in damp areas.
The manufacturer recommends that you replace the filter every 6 to 12 months, but with proper care, this can be extended to 18 months, and the main thing is to monitor the actual condition of the filter, not just the meter in the application. If you notice that the cleaner has become less able to cope with smells or dust, despite the high percentage of the resource, it is still time to change the filter.
💡
The prefilter (net) can be washed, but HEPA-No, no, no, no, no, no, no, no, no, no, no, no, no, no, no. Trying to wash them with water will cause you to lose your filtering properties.