What to do if the Xiaomi Smart Air Purifier 4 automatically shuts down two seconds after being powered on?

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Accepted Answer

If the Xiaomi Smart Air Purifier 4 automatically shuts down two seconds after being powered on, this issue is usually related to power stability, installation status, or a device protection trigger, so it is recommended to troubleshoot step by step before requesting service.
If the Xiaomi Smart Air Purifier 4 automatically shuts down two seconds after being powered on, please refer to the following methods:
1. Check whether the power supply is stable and whether the power cord is damaged, and you can also try a different wall outlet to rule out socket issues.
2. Unplug the power cord, wait for a while, then plug it back in and power on again to see whether the purifier returns to normal.
3. Check whether the filter is installed correctly and firmly, and reinstall the filter to confirm it is properly seated.
4. Try cleaning the sensor on the back of the device, because a blocked or dirty sensor may cause abnormal protection behavior.
5. After powering on, check whether there is any error prompt or warning shown on the screen, which can help identify the cause.
6. If none of the steps above solve the problem, it may be a motor-related fault, and it is recommended to contact after-sales service for further inspection.