Wi‑Fi icon on Sensi thermostat flashes continuously and app shows thermostat offline

Safety: No high‑voltage work is required. Do not open HVAC panels for this issue.

Steps to restore connection:

• Verify internet access: Confirm other devices on the same Wi‑Fi network have internet access.
• Check SSID and password: If you recently changed your Wi‑Fi name or password, use the Sensi app to reconnect the thermostat to the updated network.
• Improve signal: Move the router closer, adjust its orientation, or add a Wi‑Fi extender to improve signal strength at the thermostat location.
• Rejoin network: On the thermostat or in the app, select the option to reconnect or change Wi‑Fi network. Follow the pairing instructions carefully.
• Reboot router and thermostat: Power cycle the router and modem. Remove the thermostat from the wall for 30 seconds, then reattach and retry connection.

When to replace: If multiple known‑good networks fail and the Wi‑Fi icon never goes solid, the Wi‑Fi module may be failing, requiring thermostat replacement.