The problem of the air conditioner not being able to connect to the Internet when Alibaba Cloud stops serving may be caused by the following reasons:

1. There may be a failure or interruption in the Alibaba Cloud service, which results in the inability to connect to the air conditioner.

This may be caused by a server failure, network connection problem, etc.

2. Another possibility is that the air conditioner itself has a failure or setting problem, such as a network configuration error or firmware update problem, which results in the inability to connect to the network normally.

3. Another possibility is a problem with the network environment, which may be a weak or unstable Wi-Fi signal, or a problem with the router settings, which results in the inability to connect to the Alibaba Cloud service.

For this problem, you can try the following solutions:

1. First, you can check the Alibaba Cloud service status to confirm whether there is a service failure or interruption.

You can visit the Alibaba Cloud official website or contact their customer service department for more information.

2. Check the network configuration and settings of the air conditioner to ensure that the device is properly connected to your Wi-Fi network and that the device's firmware is up to date.

3. Check your network environment to make sure the Wi-Fi signal is stable and there is no problem with the router settings.

You can try restarting the router or using other network connection devices for testing.

If the above methods still cannot solve the problem, it is recommended that you contact the after-sales service of the air conditioner equipment or the technical support team of Alibaba Cloud, who can provide you with more specific help and guidance.