Thermostat shows a cloud icon with a slash or 'Cloud' error; local control works but app shows device offline

Safety first: No need to open the thermostat for this issue.

Steps to troubleshoot:

• Check internet connectivity on other devices using the same Wi-Fi network.
• Restart your router and modem.
• Ensure that firewall settings on the router are not blocking outbound connections for IoT devices.
• Remove the thermostat from the Tuya/Smart Life app and re-add it, forcing a new cloud registration.
• If your network uses special DNS or VPN, temporarily disable them and test again.
• If the problem persists while other Tuya devices work fine, the thermostat’s cloud credentials may be corrupted; perform a factory reset on the thermostat and reconfigure.