Sensi thermostat: An X icon, or “Not connected to network”
The thermostat can’t connect to your home Wi-Fi network.
Applies to: Sensi thermostats. What you see: a symbol and words.
What Sensi says to do
- If you changed your Wi-Fi name or password, or put in a new router, reconnect the thermostat to the network.
- Reboot the router: unplug it for 5 to 10 minutes, plug it back in and allow 1 to 5 minutes; check a phone on the 2.4 GHz network can load a website.
- Reset the thermostat, then reconnect it to Wi-Fi.
- Check router settings: firewall not too high, no special port settings or parental controls, and different names for each band on a dual-band router.
The maker puts this down to Wi-Fi or the network. If the problem is the router itself, its own lights are explained on the router and broadband hub lights page.
Source
Sensi’s own help page, read on the date shown.
- Sensi Support (Copeland): Sensi is not connected to your home network — Sensi thermostats. sensi.copeland.com Checked 2026-09-29.