Mistake of the supply fan Xiaomi: how to reset and return to work

Xiaomi ventilation systems are some of the most popular solutions for smart homes, but even they are not immune to failures. The supply fan error can manifest itself both on budget models like the Mi Air Purifier 2S, and on advanced systems like the Xiaomi Smartmi Air Purifier Pro H. Most often, the problem is accompanied by flashing indicators, errors in the Mi Home application or a complete stoppage of the device.

The causes of malfunctions range from software failures to mechanical failures, but in 70% of cases, the problem can be fixed by yourself without going to the service center. In this article, we will discuss all possible ways to reset the error, including hardware reset, firmware updates and diagnostics of mechanical components. Particular attention will be paid to models with Wi-Fi support and integration into the Mi Home ecosystem, because their reset has nuances.

If your fan is giving you an error code (e.g., E1, E2, or F3), don't panic. Most of the time, it's a temporary failure signal, not a critical failure signal, and then step-by-step instructions for scenarios ranging from simple restart to deep diagnostics.

Typical errors of Xiaomi’s supply fans and their significance

Xiaomi’s smart fans use a system of error codes to help identify the problem, and decrypting those codes is the first step to getting the reset right, and here’s a table of the most common errors and their possible causes.

If your model produces code that is not listed in the table, check the documentation for the device or use the official Mi Home app – there is often a transcript for specific versions of the firmware. For example, in Smartmi Air Purifier Pro H, an E5 error can mean an inverter power supply problem that requires professional repair.

⚠️ Warning: Error codes may vary depending on the regional firmware. If the error repeats after the reset, try updating the software through the Mi Home app to the latest version.

Resetting: The First Step to Recovery

Most of the errors of Xiaomi’s inflow fans are fixed by a simple software reset, which does not affect mechanical components and is safe for the device, and is suitable for all models with Mi Home support, including the Mi Air Purifier 3H and Smartmi Fresh Air System.

To perform the discharge:

• 🔌 Turn off the fan for 10 to 15 minutes, and this will drain the capacitors and reset the temporary memory.
• 📱 Remove the device from the Mi Home app (if registered there). Go to Profile → My Devices → Select Fan → Delete to do so.
• 🔄 Turn the fan back on the network and wait for initialization (usually takes 1-2 minutes).

If the error persists after this, proceed to hard reset, which erases all user settings, including schedules and saved modes.

Make sure the fan is connected to the 220V network

Prepare a paper clip or thin item to press the Reset button

Disable other Xiaomi smart devices up close to avoid conflicts

Write down the current settings (if possible) for quick recovery-->

Hard Reset: When software methods don't help

Hard resets return the fan to factory settings and often resolves E0, E1 and F3 errors. The procedure is different for different models, but the general principle is the same: press the hidden Reset button or hold the button combination on the control panel.

For most Xiaomi models (e.g. Mi Air Purifier 2S/3H):

1. Turn off the fan from the network.
2. Find a small hole on the back that says Reset (usually next to the power connector).
3. Insert a paperclip or toothpick into the hole and hold the button for 5-10 seconds until the indicator flashes yellow or red.
4. Connect the fan back to the network, and the device will reboot and be ready for a new setup.

For the Smartmi Air Purifier Pro H and Fresh Air System, the process is a bit more complicated:

1. Hold the power button on the panel for 10 seconds (up to a double beep).


2. Release the button and press it again for 3 seconds.




3. The fan will emit an audible signal and begin the reset process (the indicator will flash white).

⚠️ Warning: After a hard reset, the fan will lose the binding to the Mi Home account and all user settings. If the device was part of the automatic smart home system (for example, associated with the Xiaomi Gateway), you will need to reconfigure the scripts.

💡

If the Reset button doesn't respond, check if the contact inside the hole is contaminated. Carefully clean it with compressed air or a cotton swab dipped in alcohol.

Update: Fixing errors through Mi Home

Outdated firmware is one of the main reasons for the malfunction of Xiaomi’s inflow fans.The manufacturer regularly releases updates that correct errors in the engine, sensors and Wi-Fi module. You can check the relevance of the firmware in the Mi Home application.

Instructions for updating:

1. Open Mi Home and select your fan from the list of devices.
2. Go to Settings → About the device → Update firmware.
3. If a new version is available, click Update and wait until the process is completed (usually takes 5-15 minutes).
4. Do not disconnect the fan from the network during the upgrade – this can lead to a critical failure requiring flashing over USB.

If automatic updates do not help or the firmware is damaged, you can try manual installation through the OTA- packet.

• 🌐 Download the latest firmware for your model from Xiaomi’s official website (Air Purifier section).
• 📁 Unpack the archive and place the firmware file (usually with the.bin or.pkg extension) in the root of the USB- drive (formatted in FAT32).
• 🔌 Connect the flash drive to the fan (if the model supports USB- port) and hold the power button for 5 seconds to start the update mode.

Diagnostics of mechanical malfunctions

If the software methods don't fix the bug, the problem may be the mechanical components, and the most common ones are:

• 🌀 Fan blades - clogging with dust or foreign objects (hair, thread).
• 🔄 Engine bearings - wear or lack of lubrication.
• 🔌 Air sensors: Pollution or physical damage.
• 🔋 Power supply - unstable voltage or overheating.

For diagnosis:

1. Disconnect the fan from the network and remove the front panel (usually it is attached to the latches).
2. Check the blades for blockages. Carefully remove the dust with a soft brush or vacuum cleaner.
3. Scroll the blades manually, they should rotate smoothly, without creaking. If you feel resistance, you need to lubricate the bearings (use silicone lubrication).
4. Check the sensors (usually located next to the air intake) and wipe them with a dry wipe.

If you see damaged wires, melted contacts or cracks on the board, it is not recommended to repair the device yourself - contact the service center. Attempting to solder or replace components without experience can lead to a short circuit.

Mi Home Communication Errors: Restore Connection

Errors like F3 or Wi-Fi Error indicate communication problems between the fan and the Mi Home app.

• 📶 Unstable Wi-Fi signal (too weak or frequent channel change).
• 🔄 Conflict of IP- addresses in a local network.
• 🔒 Locking the device with a router firewall.
• 📱 An outdated version of the Mi Home app.

To reconnect:

1. Restart the router and fan.
2. In the Mi Home app, remove the device and add it again by selecting the same Wi-Fi network.
3. If the fan doesn’t find the network, check if it supports the 2.4 GHz band (most Xiaomi models don’t work with 5 GHz).
4. Turn off Band Steering (banding bands) on the router if it is enabled.

If the problem persists, try connecting the fan to another network (such as a mobile hotspot) to help determine whether the router or the device itself is to blame.

When service repairs are required

Not all errors can be fixed by yourself. You should contact the Xiaomi service center in the following cases:

• 🔥 The smell of burning or fan smoke is a sign of short circuit or overheating of the engine windings.
• ⚡ Sparkling or cracking during operation - a power supply may malfunction.
• 🛠️ Mechanical damage to the housing or blades which cannot be repaired without disassembly.
• 🔄 Cyclical reboot of the device (the fan is constantly switched on and off).
• 📵 Complete lack of response to buttons and reset (maternal board malfunction is possible).

Before the service visit:

• Take a picture of the error (if it is displayed on the display).
• Write down the serial number of the device (usually shown on the back sticker).
• Check with Xiaomi support to see if your model is covered by a warranty (for most fans, it is 12 months).

⚠️ Warning: Self-repairing with disassembly of the shell may void the warranty. If the device is warranty, do not attempt to repair it without the approval of the service center.

FAQ: Frequent questions about Xiaomi fans errors