Thermostat shows E17 and cannot connect to the internet or Wiser cloud services

Safety first: Network troubleshooting does not involve mains wiring.

• Check router status: Confirm internet access on another device. Restart the router if needed.
• Verify Heat Hub connection: If using Ethernet, ensure the cable is firmly plugged in and the router port LED is lit. If using Wi‑Fi, check the hub’s Wi‑Fi indicator.
• Restart Heat Hub: Power-cycle the hub and wait several minutes for it to reconnect.
• Check firewall settings: Ensure your router or security software is not blocking outbound connections required by Wiser (consult Wiser documentation for ports/domains).
• If E17 persists: Use the app in local mode if available, and contact Wiser support to check for service outages or account issues.