Thermostat shows E10 and cannot connect to the iComfort cloud or mobile app

Safety first: No internal electrical work is required for this fault, but avoid opening equipment panels while powered.

• Step 1 – Verify internet: Confirm that other devices in the home can access the internet. Reboot the router and modem if needed.
• Step 2 – Check Wi‑Fi status: On the thermostat, go to Network settings and confirm it is connected to your Wi‑Fi with a strong signal.
• Step 3 – Time and date: Ensure the thermostat’s time, date, and time zone are set correctly. Incorrect settings can cause SSL or server authentication issues.
• Step 4 – Firewall/router settings: Make sure your router is not blocking outbound connections from the thermostat. Disable overly aggressive parental controls or firewall rules temporarily to test.
• Step 5 – Firmware update: If possible, check for and install any available firmware updates from the thermostat menu.
• Step 6 – Re‑link account: In the iComfort app, remove the thermostat and then re‑add it using the on‑screen pairing instructions. If E10 persists, contact iComfort support to verify cloud service status.