What to do if the fan speed of the Mijia Air Conditioner Pro Eco 3.5 kW cannot be adjusted?

If the fan speed of the Mijia Air Conditioner Pro Eco 3.5 kW cannot be adjusted, please follow these steps:
When the remote control cannot adjust the fan speed:
1. Check whether the remote control batteries have power. If they are depleted and the remote is unresponsive, replace them with new ones;
2. After confirming the batteries are functional, check whether the remote control display is working and if other buttons respond correctly;
3. Make sure you are checking the fan speed level in the upper LCD area of the remote control and using the fan speed button to make adjustments;
4. If the remote appears normal, confirm whether the air conditioner is receiving the remote signal, such as by listening for a beep sound;
5. Turn off the air conditioner power for 3 to 5 minutes, then restart it and check if the fan speed adjustment works again;
6. If the issue still cannot be resolved after following the above steps, please request after-sales service for further inspection.
When the Mi Home/Xiaomi Home APP cannot adjust the fan speed:
1. Disconnect the air conditioner from the Mi Home/Xiaomi Home APP completely. Delete the device in the app and reset the air conditioner's Wi-Fi settings. Then control it only using the remote control;
2. Check if there is interference from other remote-controlled devices in your home. Confirm whether the problem occurs when using another device’s remote;
3. If the issue persists after these checks, please request after-sales service for further inspection;
4. If the problem is resolved after disconnection, it is due to smart settings in the Mi Home/Xiaomi Home APP. You can reset the air conditioner's Wi-Fi and reconnect it to the app to clear the previous data.
If both the remote control and the Mi Home/Xiaomi Home APP are unable to adjust the fan speed, please contact after-sales service for inspection.