Thermostat display shows E01 and cannot connect to the Ngenic cloud service; remote control via app is unavailable.

Safety first: This issue is network-related; no mains wiring should be touched. Do not open the thermostat or control module housing.

• Check internet connection: Verify that other devices (phone, laptop) can browse the web using the same Wi‑Fi network.
• Reboot network equipment: Power-cycle your internet modem and Wi‑Fi router by unplugging them for 30 seconds, then plug back in and wait 3–5 minutes.
• Verify router settings: Ensure your router is not blocking outbound connections or using parental controls that might block Ngenic cloud servers. Disable any VPN on the router temporarily.
• Restart the thermostat: Use the menu to restart the Ngenic thermostat (or remove it from the wall plate for 30 seconds if the design allows, then reattach).
• Reconfigure Wi‑Fi: On the thermostat, open Settings → Network/Wi‑Fi, forget the current network, then reconnect using the correct SSID and password.
• Update firmware: If local menus allow, check for firmware updates and install them once connectivity is restored.

If E01 persists while other devices have internet, contact Ngenic support to verify cloud service status and check if your device’s serial number or firmware is affected.